RED SLIDE: These are notes that are very important and should be recorded in your science journal. Copyright © 2010 Ryan P. Murphy

-Nice neat notes that are legible and use indentations when appropriate.

-Nice neat notes that are legible and use indentations when appropriate. -Example of indent.

-Nice neat notes that are legible and use indentations when appropriate. -Example of indent. -Skip a line between topics

-Nice neat notes that are legible and use indentations when appropriate. -Example of indent. -Skip a line between topics -Make visuals clear and well drawn.

-Nice neat notes that are legible and use indentations when appropriate. -Example of indent. -Skip a line between topics -Make visuals clear and well drawn. Please label. Effort Arm Resistance Arm

RED SLIDE: These are notes that are very important and should be recorded in your science journal. BLACK SLIDE: Pay attention, follow directions, complete projects as described and answer required questions neatly. Copyright © 2010 Ryan P. Murphy

Keep an eye out for “The-Owl” and raise your hand as soon as you see him. –He will be hiding somewhere in the slideshow Copyright © 2010 Ryan P. Murphy

Keep an eye out for “The-Owl” and raise your hand as soon as you see him. –He will be hiding somewhere in the slideshow “Hoot, Hoot” “Good Luck!” Copyright © 2010 Ryan P. Murphy

Law Conservation of energy: energy cannot be created or destroyed.

–Simple machines generally require more work / energy to complete a task, but they…

Machines… Machines… Copyright © 2010 Ryan P. Murphy

Transfer force from one place to another. Transfer force from one place to another. Copyright © 2010 Ryan P. Murphy

Change direction of a force. Change direction of a force. Copyright © 2010 Ryan P. Murphy

Increase the magnitude of a force. Increase the magnitude of a force. Copyright © 2010 Ryan P. Murphy

Increase the distance or speed of a force. Increase the distance or speed of a force. Copyright © 2010 Ryan P. Murphy

Machine: Anything that helps you do work.

Work = Force x Distance

Which of the following is not something machines do. –B.) Machines can change the direction of the force you put in. ( ex. A Car jack) –C.) Machines create energy in order to complete a force. (ex. reactor) –D.) Machines can increase the speed of the force. (ex. Bicycle)

Which of the following is not something machines do. –A.) Machines can make the force you put into a machine greater. (ex. Pliers) –B.) Machines can change the direction of the force you put in. ( ex. A Car jack) –C.) Machines create energy in order to complete a force. (ex. reactor) –D.) Machines can increase the speed of the force. (ex. Bicycle)

Which of the following is not something machines do. –A.) Machines can make the force you put into a machine greater. (ex. Pliers) –B.) Machines can change the direction of the force you put in. ( ex. A Car jack) –C.) Machines create energy in order to complete a force. (ex. reactor) –D.) Machines can increase the speed of the force. (ex. Bicycle)

Which of the following is not something machines do. –A.) Machines can make the force you put into a machine greater. (ex. Pliers) –B.) Machines can change the direction of the force you put in. ( ex. A Car jack) –C.) Machines create energy in order to complete a force. (ex. reactor) –D.) Machines can increase the speed of the force. (ex. Bicycle)

Which of the following is not something machines do. –A.) Machines can make the force you put into a machine greater. (ex. Pliers) –B.) Machines can change the direction of the force you put in. ( ex. A Car jack) –C.) Machines create energy in order to complete a force. (ex. reactor) –D.) Machines can increase the speed of the force. (ex. Bicycle)

Which of the following is not something machines do. –A.) Machines can make the force you put into a machine greater. (ex. Pliers) –B.) Machines can change the direction of the force you put in. ( ex. A Car jack) –C.) Machines create energy in order to complete a force. (ex. reactor) –D.) Machines can increase the speed of the force. (ex. Bicycle)

Which of the following is not something machines do. –A.) Machines can make the force you put into a machine greater. (ex. Pliers) –B.) Machines can change the direction of the force you put in. ( ex. A Car jack) –C.) Machines create energy in order to complete a force. (ex. reactor) –D.) Machines can increase the speed of the force. (ex. Bicycle)

Match the correct work of machines to the picture. –A.) Machines can increase the speed of the force. –B.) Machines can make the force you put into a machine greater. –C.) Machines can change the direction of the force you put in.

Match the correct work of machines to the picture. –A.) Machines can increase the speed of the force. –B.) Machines can make the force you put into a machine greater. –C.) Machines can change the direction of the force you put in.

Match the correct work of machines to the picture. –A.) Machines can increase the speed of the force. –B.) Machines can make the force you put into a machine greater. –C.) Machines can change the direction of the force you put in.

Match the correct work of machines to the picture. –A.) Machines can increase the speed of the force. –B.) Machines can make the force you put into a machine greater. –C.) Machines can change the direction of the force you put in.

Match the correct work of machines to the picture. –A.) Machines can increase the speed of the force. –B.) Machines can make the force you put into a machine greater. –C.) Machines can change the direction of the force you put in.

Match the correct work of machines to the picture. –A.) Machines can increase the speed of the force. –B.) Machines can make the force you put into a machine greater. –C.) Machines can change the direction of the force you put in.

Match the correct work of machines to the picture. –A.) Machines can increase the speed of the force. –B.) Machines can make the force you put into a machine greater. –C.) Machines can change the direction of the force you put in.

Law Conservation of energy: energy cannot be created or destroyed.

–Simple machines generally require more work / energy to complete a task. Example

Law Conservation of energy: energy cannot be created or destroyed. –Simple machines generally require more work / energy to complete a task. Example

Law Conservation of energy: energy cannot be created or destroyed. –Simple machines generally require more work / energy to complete a task. Example

Law Conservation of energy: energy cannot be created or destroyed. –Simple machines generally require more work / energy to complete a task. Example

Law Conservation of energy: energy cannot be created or destroyed. –Simple machines generally require more work / energy to complete a task. Example

Law Conservation of energy: energy cannot be created or destroyed. –Simple machines generally require more work / energy to complete a task. Example

Law Conservation of energy: energy cannot be created or destroyed. –Simple machines generally require more work / energy to complete a task. Example

Law Conservation of energy: energy cannot be created or destroyed. –Simple machines generally require more work / energy to complete a task. Example

Law Conservation of energy: energy cannot be created or destroyed. –Simple machines generally require more work / energy to complete a task. Example

Law Conservation of energy: energy cannot be created or destroyed. –Simple machines generally require more work / energy to complete a task. Example

Law Conservation of energy: energy cannot be created or destroyed. –Simple machines generally require more work / energy to complete a task. Example

Law Conservation of energy: energy cannot be created or destroyed. –Simple machines generally require more work / energy to complete a task. Example

Law Conservation of energy: energy cannot be created or destroyed. –Simple machines generally require more work / energy to complete a task. Example

Law Conservation of energy: energy cannot be created or destroyed. –Simple machines generally require more work / energy to complete a task. Example

Law Conservation of energy: energy cannot be created or destroyed. –Simple machines generally require more work / energy to complete a task. Example

Law Conservation of energy: energy cannot be created or destroyed. –Simple machines generally require more work / energy to complete a task. Example

Law Conservation of energy: energy cannot be created or destroyed. –Simple machines generally require more work / energy to complete a task. Example

Efficiency: A measure of how much more work must be put into a machine than you get out of the machine.

The efficiency of a machine will always be less than 100%.

Efficiency: A measure of how much more work must be put into a machine than you get out of the machine. –The efficiency of a machine will always be less than 100%. –If there was no friction, the best you could hope for is an efficiency of 100% meaning work in = work out.

Efficiency: A measure of how much more work must be put into a machine than you get out of the machine. –The efficiency of a machine will always be less than 100%. –If there was no friction, the best you could hope for is an efficiency of 100% meaning work in = work out.

Efficiency: A measure of how much more work must be put into a machine than you get out of the machine. –The efficiency of a machine will always be less than 100%. –If there was no friction, the best you could hope for is an efficiency of 100% meaning work in = work out.

Force is measured in a unit called the Newton. Force is measured in a unit called the Newton. Copyright © 2010 Ryan P. Murphy

Force is measured in a unit called the Newton. Force is measured in a unit called the Newton. Copyright © 2010 Ryan P. Murphy

Force is measured in a unit called the Newton. Force is measured in a unit called the Newton. Copyright © 2010 Ryan P. Murphy

Force is measured in a unit called the Newton. Force is measured in a unit called the Newton. Copyright © 2010 Ryan P. Murphy

Force is measured in a unit called the Newton. Force is measured in a unit called the Newton. Copyright © 2010 Ryan P. Murphy

Force is measured in a unit called the Newton. Force is measured in a unit called the Newton. Copyright © 2010 Ryan P. Murphy

Force is measured in a unit called the Newton. Force is measured in a unit called the Newton. Copyright © 2010 Ryan P. Murphy

Force is measured in a unit called the Newton. Force is measured in a unit called the Newton. Copyright © 2010 Ryan P. Murphy

Force is measured in a unit called the Newton. Force is measured in a unit called the Newton. Copyright © 2010 Ryan P. Murphy

Force is measured in a unit called the Newton. Force is measured in a unit called the Newton. Copyright © 2010 Ryan P. Murphy

One Newton is the amount of force required to give a 1 kg mass an acceleration of 1 m/s/s. One Newton is the amount of force required to give a 1 kg mass an acceleration of 1 m/s/s. Copyright © 2010 Ryan P. Murphy

One Newton is the amount of force required to give a 1 kg mass an acceleration of 1 m/s/s. One Newton is the amount of force required to give a 1 kg mass an acceleration of 1 m/s/s. Copyright © 2010 Ryan P. Murphy

One Newton is the amount of force required to give a 1 kg mass an acceleration of 1 m/s/s. One Newton is the amount of force required to give a 1 kg mass an acceleration of 1 m/s/s. Copyright © 2010 Ryan P. Murphy Learn more: Force. laws/u2l2a.cfm laws/u2l2a.cfm laws/u2l2a.cfm

One Newton is the amount of force required to give a 1 kg mass an acceleration of 1 m/s/s.One Newton is the amount of force required to give a 1 kg mass an acceleration of 1 m/s/s. Copyright © 2010 Ryan P. Murphy

One Newton is the amount of force required to give a 1 kg mass an acceleration of 1 m/s/s.One Newton is the amount of force required to give a 1 kg mass an acceleration of 1 m/s/s. Copyright © 2010 Ryan P. Murphy

Mass: Amount of matter in an object. Mass: Amount of matter in an object. Copyright © 2010 Ryan P. Murphy

“I’m weightless but I still have mass.” Copyright © 2010 Ryan P. Murphy

New Area of focus: Simple Machines. New Area of focus: Simple Machines. Copyright © 2010 Ryan P. Murphy

Activity: Ancient use of Simple Machines. –Use PVC piping to move an upside down lab table and some people sitting on it down the hall. Copyright © 2010 Ryan P. Murphy

Set-up of challenge. –Move pipes from the rear to the front before the table moves. –How efficient can your group work?

Please reflect upon the activity. –What type of machine was used? –Did it help? Copyright © 2010 Ryan P. Murphy

Mechanical advantage (MA): The number of times a machine multiplies your effort force. Mechanical advantage (MA): The number of times a machine multiplies your effort force. Copyright © 2010 Ryan P. Murphy

To find MA To find MA Divide resistance force (usually weight in g) by the effort force (Newtons) Divide resistance force (usually weight in g) by the effort force (Newtons) Copyright © 2010 Ryan P. Murphy

To find MA To find MA Divide resistance force (usually weight in g) by the effort force (Newton) Divide resistance force (usually weight in g) by the effort force (Newton) Copyright © 2010 Ryan P. Murphy

To find MA To find MA Divide resistance force (usually weight in g) by the effort force (Newton) Divide resistance force (usually weight in g) by the effort force (Newton) Copyright © 2010 Ryan P. Murphy

To find MA To find MA Divide resistance force (usually weight in g) by the effort force (Newton) Divide resistance force (usually weight in g) by the effort force (Newton) Copyright © 2010 Ryan P. Murphy

To find MA To find MA Divide resistance force (usually weight in g) by the effort force (Newton) Divide resistance force (usually weight in g) by the effort force (Newton) Copyright © 2010 Ryan P. Murphy

To find MA To find MA Divide resistance force (usually weight in g) by the effort force (Newton) Divide resistance force (usually weight in g) by the effort force (Newton) Copyright © 2010 Ryan P. Murphy FOFOFOFO = MA

To find MA To find MA Divide resistance force (usually weight in g) by the effort force (Newton) Divide resistance force (usually weight in g) by the effort force (Newton) Copyright © 2010 Ryan P. Murphy FOFOFOFO FIFIFIFI = MA

Find the MA of the following. The work input was 2, and the output was 18.The work input was 2, and the output was 18.

Find the MA of the following. The work input was 2, and the output was 18.The work input was 2, and the output was 18.

Find the MA of the following. The work input was 2, and the output was 18.The work input was 2, and the output was 18. FIFIFIFI FOFOFOFO

Find the MA of the following. The work input was 2, and the output was 18.The work input was 2, and the output was 18. FIFIFIFI FOFOFOFO

Find the MA of the following. The work input was 2, and the output was 18.The work input was 2, and the output was 18. FIFIFIFI FOFOFOFO

Find the MA of the following. The work input was 2, and the output was 18.The work input was 2, and the output was 18. FIFIFIFI FOFOFOFO 2 18

Find the MA of the following. The work input was 2, and the output was 18.The work input was 2, and the output was 18. FIFIFIFI FOFOFOFO 2 18 = 9 MA

Find the MA of the following. The work input was 2, and the output was 18.The work input was 2, and the output was 18. FIFIFIFI FOFOFOFO 2 18 = 9 MA Mechanical Advantage: Learn More at… online.com/objects/ViewObject.aspx?ID=ENG online.com/objects/ViewObject.aspx?ID=ENG20504http:// online.com/objects/ViewObject.aspx?ID=ENG20504

12 N 6 N

12 N 6 N FOFOFOFO FIFIFIFI

12 N 6 N FOFOFOFO FIFIFIFI

12 N 6 N FOFOFOFO FIFIFIFI

12 N 6 N FOFOFOFO FIFIFIFI 6N 12N

12 N 6 N FOFOFOFO FIFIFIFI 6N 12N = 12 MA

40 N 20 N

40 N 20 N FOFOFOFO FIFIFIFI

40 N 20 N FOFOFOFO FIFIFIFI

40 N 20 N FOFOFOFO FIFIFIFI 20N 40N

40 N 20 N FOFOFOFO FIFIFIFI 20N 40N = 2 MA

40 N 20 N FOFOFOFO FIFIFIFI 20N 40N = 2 MA

90 N 45 N

90 N 45 N FOFOFOFO FIFIFIFI

90 N 45 N FOFOFOFO FIFIFIFI 45N 90N

90 N 45 N FOFOFOFO FIFIFIFI 45N 90N = 2 MA

Law Conservation of Energy

–Energy cannot be created or destroyed.

Law Conservation of Energy –Energy cannot be created or destroyed. –Energy can be transferred.

Law Conservation of Energy –Energy cannot be created or destroyed. –Energy can be transferred.

Law Conservation of Energy –Energy cannot be created or destroyed. –Energy can be transferred.

Video Links! Mechanical Advantage, Khan Academy, Optional (Advanced) (I,II,III) – echanics/v/introduction-to-mechanical-advantage (Part 1) echanics/v/introduction-to-mechanical-advantage – echanics/v/mechanical-advantage--part-2 (2) echanics/v/mechanical-advantage--part-2 – echanics/v/mechanical-advantage--part-3 (3) echanics/v/mechanical-advantage--part-3

Simple machines: Types of machines that do work with one movement. Simple machines: Types of machines that do work with one movement. Copyright © 2010 Ryan P. Murphy

Simple machines: Types of machines that do work with one movement. Simple machines: Types of machines that do work with one movement. Copyright © 2010 Ryan P. Murphy

Simple machines: Types of machines that do work with one movement. Simple machines: Types of machines that do work with one movement. Copyright © 2010 Ryan P. Murphy

Simple machines: Types of machines that do work with one movement. Simple machines: Types of machines that do work with one movement. Copyright © 2010 Ryan P. Murphy

Simple machines: Types of machines that do work with one movement. Simple machines: Types of machines that do work with one movement. Copyright © 2010 Ryan P. Murphy

Simple machines: Types of machines that do work with one movement. Simple machines: Types of machines that do work with one movement. Copyright © 2010 Ryan P. Murphy

Simple machines: Types of machines that do work with one movement. Simple machines: Types of machines that do work with one movement. Copyright © 2010 Ryan P. Murphy

Simple machines: Types of machines that do work with one movement. Simple machines: Types of machines that do work with one movement. Copyright © 2010 Ryan P. Murphy

Simple machines: Types of machines that do work with one movement. Simple machines: Types of machines that do work with one movement. Copyright © 2010 Ryan P. Murphy

Simple machines: Types of machines that do work with one movement. Simple machines: Types of machines that do work with one movement. Copyright © 2010 Ryan P. Murphy

Simple Machines Available Sheet: Pulleys

Pulley Pulley Uses grooved wheels and a rope to raise, lower or move a load. Uses grooved wheels and a rope to raise, lower or move a load. Copyright © 2010 Ryan P. Murphy

Pulley Pulley Uses grooved wheels and a rope to raise, lower or move a load. Uses grooved wheels and a rope to raise, lower or move a load. Copyright © 2010 Ryan P. Murphy

A pulley makes work seem easier A pulley makes work seem easier Copyright © 2010 Ryan P. Murphy

A pulley makes work seem easier A pulley makes work seem easier Copyright © 2010 Ryan P. Murphy

A pulley makes work seem easier A pulley makes work seem easier Changes the direction of motion to work with gravity. Changes the direction of motion to work with gravity. Copyright © 2010 Ryan P. Murphy

A pulley makes work seem easier A pulley makes work seem easier Changes the direction of motion to work with gravity. Instead of lifting up, you can pull down. Changes the direction of motion to work with gravity. Instead of lifting up, you can pull down. Copyright © 2010 Ryan P. Murphy

A pulley makes work seem easier A pulley makes work seem easier Changes the direction of motion to work with gravity. Instead of lifting up, you can pull down. Changes the direction of motion to work with gravity. Instead of lifting up, you can pull down. Uses your body weight against the resistance. Uses your body weight against the resistance. Copyright © 2010 Ryan P. Murphy

The more pulleys that are used, the more the MA (Mechanical Advantage). The more pulleys that are used, the more the MA (Mechanical Advantage). Copyright © 2010 Ryan P. Murphy

The more pulleys that are used, the more the MA (Mechanical Advantage). The more pulleys that are used, the more the MA (Mechanical Advantage). Copyright © 2010 Ryan P. Murphy

MA = The number of ropes that support the pulley. The end of the rope doesn’t count. MA = The number of ropes that support the pulley. The end of the rope doesn’t count. What is the MA of this pulley system below? What is the MA of this pulley system below? Copyright © 2010 Ryan P. Murphy

MA = The number of ropes that support the pulley. The end of the rope doesn’t count. –What is the MA of this pulley system below? Copyright © 2010 Ryan P. Murphy

MA = The number of ropes that support the pulley. The end of the rope doesn’t count. MA =2 –What is the MA of this pulley system below? Copyright © 2010 Ryan P. Murphy

MA = The number of ropes that support the pulley. The end of the rope doesn’t count. MA =2 –What is the MA of this pulley system below? Copyright © 2010 Ryan P. Murphy

MA = The number of ropes that support the pulley. The end of the rope doesn’t count. MA =2 –What is the MA of this pulley system below? Copyright © 2010 Ryan P. Murphy FIFIFIFI =

MA = The number of ropes that support the pulley. The end of the rope doesn’t count. MA =2 –What is the MA of this pulley system below? Copyright © 2010 Ryan P. Murphy FOFOFOFO FIFIFIFI

MA = The number of ropes that support the pulley. The end of the rope doesn’t count. MA =2 –What is the MA of this pulley system below? Copyright © 2010 Ryan P. Murphy FOFOFOFO FIFIFIFI FIFIFIFI FOFOFOFO

MA = The number of ropes that support the pulley. The end of the rope doesn’t count. MA =2 –What is the MA of this pulley system below? Copyright © 2010 Ryan P. Murphy FOFOFOFO FIFIFIFI FIFIFIFI FOFOFOFO 100 kg 50 kg

MA = The number of ropes that support the pulley. The end of the rope doesn’t count. MA =2 –What is the MA of this pulley system below? Copyright © 2010 Ryan P. Murphy FOFOFOFO FIFIFIFI FIFIFIFI FOFOFOFO 100 kg 50 kg = 2 MA

What is the MA of this pulley system? MA=2 Copyright © 2010 Ryan P. Murphy

Answer, the MA is 4. Copyright © 2010 Ryan P. Murphy

Answer, the MA is 4. Copyright © 2010 Ryan P. Murphy

Answer, the MA is 4. Copyright © 2010 Ryan P. Murphy FIFIFIFI FOFOFOFO

Answer, the MA is 4. Copyright © 2010 Ryan P. Murphy FIFIFIFI FOFOFOFO FIFIFIFI FOFOFOFO

Answer, the MA is 4. Copyright © 2010 Ryan P. Murphy FIFIFIFI FOFOFOFO FIFIFIFI FOFOFOFO

Answer, the MA is 4. Copyright © 2010 Ryan P. Murphy FIFIFIFI FOFOFOFO FIFIFIFI FOFOFOFO

Answer, the MA is 4. Copyright © 2010 Ryan P. Murphy FIFIFIFI FOFOFOFO FIFIFIFI FOFOFOFO = 4 MA

What is the MA?

Pulley Simulator: (Optional) –

Three types of pulleys Three types of pulleys Copyright © 2010 Ryan P. Murphy

Fixed pulley Fixed pulley No MA No MA Copyright © 2010 Ryan P. Murphy

Fixed pulley Fixed pulley No MA No MA Copyright © 2010 Ryan P. Murphy

Movable Pulley (MA of 2) Movable Pulley (MA of 2) Copyright © 2010 Ryan P. Murphy

Movable Pulley (MA of 2) Movable Pulley (MA of 2) Copyright © 2010 Ryan P. Murphy

Combined Pulley / Block and tackle Combined Pulley / Block and tackle Copyright © 2010 Ryan P. Murphy

Rock climbing uses pulleys. Copyright © 2010 Ryan P. Murphy

Rock climbing uses pulleys. Copyright © 2010 Ryan P. Murphy

Rock climbing uses pulleys. Copyright © 2010 Ryan P. Murphy

Sailing uses pulleys to ease difficult jobs. Copyright © 2010 Ryan P. Murphy

Pulleys

The chain on your bicycle is a pulley.

Quiz Wiz 1-10 Fixed Pulley, Moveable Pulley, Block and Tackle/Combined Pulley Copyright © 2010 Ryan P. Murphy

* Bonus: Name this family that used simple machines to create a tree house?

Answers! Quiz Wiz 1-10 Fixed Pulley, Moveable Pulley, Block and Tackle/Combined Pulley Copyright © 2010 Ryan P. Murphy

* Bonus: Name this family that used simple machines to create a tree house?

Activity! Using the three types of Pulleys Copyright © 2010 Ryan P. Murphy

Activity! Using the three types of Pulleys Copyright © 2010 Ryan P. Murphy I wonder what the MA of this pulley system is?

Activity! Using the three types of Pulleys Copyright © 2010 Ryan P. Murphy I wonder what the MA of this pulley system is?

Activity! Using the three types of Pulleys Copyright © 2010 Ryan P. Murphy I wonder what the MA of this pulley system is?

Top Pulley Bottom Pulley

Top Pulley Bottom Pulley

Top Pulley Bottom Pulley

Top Pulley Bottom Pulley

Top Pulley Bottom Pulley

Simple Machines Available Sheet.

Please create this spreadsheet in your journal. Weight (g)newtons No Pulley____ grams Fixed Pulley____ grams Combined Pulley 2 ____ grams Combined Pulley 4 ____ grams Copyright © 2010 Ryan P. Murphy

Please use the materials to do the following. –Measure the newtons required with a Spring Scale to lift the ____ grams of weight with the different pulleys described in the spreadsheet. Copyright © 2010 Ryan P. Murphy

Please use the materials to do the following. –Measure the newtons required with a Spring Scale to lift the ____ grams of weight with the different pulleys described in the spreadsheet. Copyright © 2010 Ryan P. Murphy Remember to zero your spring scale!

Please use the materials to do the following. –Record the newtons required with a Spring Scale to lift the ____ grams of weight with a fixed pulley.

Fixed Pulley System Construction

Please use the materials to do the following. –Record the newtons with a combined pulley to lift the weight? Spring Scale Spring Scale Copyright © 2010 Ryan P. Murphy

Two Pulley System Construction

Please use the materials to do the following. –Record newtons with a combined pulley (4) to lift the ____ grams of weight?

4 Pulley System Construction

Two wheels / Pulley

4 Pulley System Construction Two wheels / Pulley

4 Pulley System Construction

If you don’t have double pulleys, you can still use 4 single pulley’s like so. Copyright © 2010 Ryan P. Murphy

Create a moveable pulley to lower the ___ gram weight into the bucket without touching it. Copyright © 2010 Ryan P. Murphy

Questions? –What was the advantage in newtons to use a fixed pulley rather than no pulley at all? –What was the advantage in Newtons to use a combined pulley over a fixed pulley? –What was the advantage in Newtons to use a combined pulley (4) over a combined pulley (2)? –Did a moveable pulley allow you to move the load with minimal effort? Copyright © 2010 Ryan P. Murphy

Questions? –What was the advantage in newtons to use a fixed pulley rather than no pulley at all? –What was the advantage in newtons to use a combined pulley over a fixed pulley? –What was the advantage in Newtons to use a combined pulley (4) over a combined pulley (2)? –Did a moveable pulley allow you to move the load with minimal effort? Copyright © 2010 Ryan P. Murphy

Questions? –What was the advantage in newtons to use a fixed pulley rather than no pulley at all? –What was the advantage in newtons to use a combined pulley over a fixed pulley? –What was the advantage in newtons to use a combined pulley (4) over a combined pulley (2)? –Did a moveable pulley allow you to move the load with minimal effort? Copyright © 2010 Ryan P. Murphy

Questions? –What was the advantage in newtons to use a fixed pulley rather than no pulley at all? –What was the advantage in newtons to use a combined pulley over a fixed pulley? –What was the advantage in newtons to use a combined pulley (4) over a combined pulley (2)? –Did a moveable pulley allow you to move the load with minimal effort? Copyright © 2010 Ryan P. Murphy

Weight (g)Newton No Pulley___ grams5 newtons Fixed Pulley___ grams5 newtons? Combined Pulley 2 ___ grams3 newtons? Combined Pulley 4 ___ grams1 newtons? Copyright © 2010 Ryan P. Murphy

Questions? –What was the advantage in newtons to use a fixed pulley rather than no pulley at all? Copyright © 2010 Ryan P. Murphy

Questions? –What was the advantage in newtons to use a fixed pulley rather than no pulley at all? –There was no Mechanical Advantage (MA) when using the fixed pulley. It was easier because you didn’t have to bend down. Copyright © 2010 Ryan P. Murphy

Questions? –What was the advantage in newtons to use a combined pulley over a fixed pulley? Copyright © 2010 Ryan P. Murphy

Questions? –What was the advantage in newtons to use a combined pulley over a fixed pulley? –The combined pulley required less force (2 newtons) to lift the load. The Mechanical Advantage was 2 newtons. Copyright © 2010 Ryan P. Murphy

Questions? –What was the advantage in newtons to use a combined pulley (4) over a combined pulley (2)? Copyright © 2010 Ryan P. Murphy

Questions? –What was the advantage in newtons to use a combined pulley (4) over a combined pulley (2)? –The (MA) was 4. It only took 1 newton to lift the load compared 3 newtons with the combined 2 pulley, and 5 newtons with no pulley at all. Copyright © 2010 Ryan P. Murphy

Pulleys. Learn more at…

Questions? –Did a moveable pulley allow you to move the load with minimal effort? Copyright © 2010 Ryan P. Murphy

Questions? –Did a moveable pulley allow you to move the load with minimal effort? –The pulley moved along the rope very easily. We were able to move the load easily once it was lifted. The pulley rolled down the rope because of it’s potential energy. Not very good for lifting. Copyright © 2010 Ryan P. Murphy

Simple Machines Available Sheet: Levers

Lever Lever -

A stiff bar that rests on a support called a fulcrum which lifts or moves loads. A stiff bar that rests on a support called a fulcrum which lifts or moves loads.

MA = length of effort arm ÷ length of resistance arm. MA = length of effort arm ÷ length of resistance arm. Copyright © 2010 Ryan P. Murphy

MA = length of effort arm ÷ length of resistance arm. MA = length of effort arm ÷ length of resistance arm. Copyright © 2010 Ryan P. Murphy

MA = length of effort arm ÷ length of resistance arm. MA = length of effort arm ÷ length of resistance arm. Copyright © 2010 Ryan P. Murphy

MA = length of effort arm ÷ length of resistance arm. MA = length of effort arm ÷ length of resistance arm. Copyright © 2010 Ryan P. Murphy Or…

MA = length of effort arm ÷ length of resistance arm. MA = length of effort arm ÷ length of resistance arm. Copyright © 2010 Ryan P. Murphy 120 N FIFIFIFI FOFOFOFO 360 N

MA = length of effort arm ÷ length of resistance arm. MA = length of effort arm ÷ length of resistance arm. Copyright © 2010 Ryan P. Murphy 120 N FIFIFIFI FOFOFOFO 360 N = FOFOFOFO FIFIFIFI

MA = length of effort arm ÷ length of resistance arm. MA = length of effort arm ÷ length of resistance arm. Copyright © 2010 Ryan P. Murphy 120 N FIFIFIFI FOFOFOFO 360 N = F O 360 N F I 120 N

MA = length of effort arm ÷ length of resistance arm. MA = length of effort arm ÷ length of resistance arm. Copyright © 2010 Ryan P. Murphy 120 N FIFIFIFI FOFOFOFO 360 N =3 MA =3 MA F O 360 N F I 120 N

What is the MA of this lever? –MA = length of effort arm ÷ length of resistance arm. Copyright © 2010 Ryan P. Murphy 6 Meters 3 meters

What is the MA of this lever? –MA = length of effort arm ÷ length of resistance arm. Copyright © 2010 Ryan P. Murphy 6 Meters 3 meters Effort Arm (6 meters) /

What is the MA of this lever? –MA = length of effort arm ÷ length of resistance arm. Copyright © 2010 Ryan P. Murphy 6 Meters 3 meters Effort Arm (6 meters) / Resistance Arm (3 Meters)

What is the MA of this lever? –MA = length of effort arm ÷ length of resistance arm. Copyright © 2010 Ryan P. Murphy 6 Meters 3 meters Effort Arm (6 meters) / Resistance Arm (3 Meters) = MA 2

What is the MA of this lever? –MA = length of effort arm ÷ length of resistance arm. Copyright © 2010 Ryan P. Murphy 12 meters 4 meters

What is the MA of this lever? –MA = length of effort arm ÷ length of resistance arm. Copyright © 2010 Ryan P. Murphy 12 meters 4 meters

What is the MA of this lever? –MA = length of effort arm ÷ length of resistance arm. Copyright © 2010 Ryan P. Murphy 12 meters 4 meters

What is the MA of this lever? –MA = length of effort arm ÷ length of resistance arm. Copyright © 2010 Ryan P. Murphy 12 meters 4 meters 12 meters / 4 meters =

What is the MA of this lever? –MA = length of effort arm ÷ length of resistance arm. Copyright © 2010 Ryan P. Murphy 12 meters 4 meters 12 meters / 4 meters = MA 3

What is the MA of this lever? –MA = length of effort arm ÷ length of resistance arm. Copyright © 2010 Ryan P. Murphy 90 N 30 N

What is the MA of this lever? –MA = length of effort arm ÷ length of resistance arm. Copyright © 2010 Ryan P. Murphy FOFOFOFO FIFIFIFI 90 N 30 N

What is the MA of this lever? –MA = length of effort arm ÷ length of resistance arm. Copyright © 2010 Ryan P. Murphy FOFOFOFO FIFIFIFI 90 N 30 N

What is the MA of this lever? –MA = length of effort arm ÷ length of resistance arm. Copyright © 2010 Ryan P. Murphy FOFOFOFO FIFIFIFI 90 N 30 N

What is the MA of this lever? –MA = length of effort arm ÷ length of resistance arm. Copyright © 2010 Ryan P. Murphy FOFOFOFO FIFIFIFI 30 N 90 N 30 N

What is the MA of this lever? –MA = length of effort arm ÷ length of resistance arm. Copyright © 2010 Ryan P. Murphy =3 MA FOFOFOFO FIFIFIFI 30 N 90 N 30 N

Video Link! Levers and skateboarding. –

The 3 types of levers The 3 types of levers Copyright © 2010 Ryan P. Murphy

The 3 types of levers The 3 types of levers Copyright © 2010 Ryan P. Murphy

The 3 types of levers The 3 types of levers Copyright © 2010 Ryan P. Murphy

The 3 types of levers The 3 types of levers Copyright © 2010 Ryan P. Murphy

The 3 types of levers The 3 types of levers Copyright © 2010 Ryan P. Murphy

Which is a first, second, and third class lever.? –Please put your finger in the air when the square lights up.

Which is a first, second, and third class lever.? –Please put your finger in the air when the square lights up.

You can now add text to the white space and neatly color the pictures to these parts.

Discuss the bungee jumping egg experience mgh Energy Ability to do work To cause something to change move or directions Energy cannot be created or destroyed, but transferred from one form to another. Discuss ME

Discuss the bungee jumping egg experience mgh Energy Ability to do work To cause something to change move or directions Energy cannot be created or destroyed, but transferred from one form to another. Discuss ME

Discuss the bungee jumping egg experience mgh Energy Ability to do work To cause something to change move or directions Energy cannot be created or destroyed, but transferred from one form to another. Discuss ME

Discuss the bungee jumping egg experience mgh Energy Ability to do work To cause something to change move or directions Energy cannot be created or destroyed, but transferred from one form to another. Discuss ME

Discuss the bungee jumping egg experience mgh Energy Ability to do work To cause something to change move or directions Energy cannot be created or destroyed, but transferred from one form to another. Discuss ME

Discuss the bungee jumping egg experience mgh Energy Ability to do work To cause something to change move or directions Energy cannot be created or destroyed, but transferred from one form to another. Discuss ME

Discuss the bungee jumping egg experience mgh Energy Ability to do work To cause something to change move or directions Energy cannot be created or destroyed, but transferred from one form to another. Discuss ME

Discuss the bungee jumping egg experience mgh Energy Ability to do work To cause something to change move or directions Energy cannot be created or destroyed, but transferred from one form to another. Discuss ME

Discuss the bungee jumping egg experience mgh Energy Ability to do work To cause something to change move or directions Energy cannot be created or destroyed, but transferred from one form to another. Discuss ME

Discuss the bungee jumping egg experience mgh Energy Ability to do work To cause something to change move or directions Energy cannot be created or destroyed, but transferred from one form to another. Discuss ME

This PowerPoint is one small part of my Laws of Motion and Simple Machines Unit This unit includes… A 3 Part 1,500+ Slide PowerPoint 15 Page bundled homework package and 11 pages of units notes that chronologically follow the PowerPoint 2 PowerPoint review games, 20+ Videos / Links, rubrics, games, activity sheets, and more. ws_Motion_Machines_Unit.htmlhttp:// ws_Motion_Machines_Unit.html

Purchase the entire four curriculum, 35,000 slides, hundreds of pages of homework, lesson notes, review games, and much more. _Motion_Machines_Unit.html Please feel free to contact me with any questions you may have. Thanks again for your interest in this curriculum. Sincerely, Ryan Murphy M.Ed