Simple Machines Mechanical Advantage. Ideal Mechanical Advantage:  Is the mechanical advantage of an “ideal machine”  Theoretical value  The IMA for.

Slides:

Advertisements

Similar presentations

Simple Machines.

Advertisements

Work and Machines Work – energy transferred when a force makes an object move 2 conditions must apply for there to be work: The object must move Movement.

Mechanical Advantage What do simple machines do for us anyway?

Practice Problems Work and Mechanical Advantage

Designing Simple Machines Using Mechanical and Ideal Mechanical Advantage.

What is an instrument that makes work easier called?

A nutcracker is a machine that converts the input force applied to it into a larger force capable of cracking a nut. Because it increases force, the nutcracker.

Simple Machines: More Practice. Inclined Plane Simple Machines: More Practice.

Mechanical Advantage and Efficiency

Simple Machines Why are machines useful and how do they relate to what he have been discussing about energy?

Levers and Torque: More Practice. Classes of Levers: Student Learning Goal The student will investigate the relationships between force, distance,

Making WORK easier!.

Calculating Mechanical Advantage Inclined Plane, Pulley, Lever.

Ch. 5 Simple Machines.

MACHINES and EFFICIENCY Chapter Key Terms Work = Force x distance Simple machine ◦ a device used to multiply forces or change the direction of.

Mechanical Advantage & Efficiency.

Simple Machines.

What is mechanical advantage?

Applied Physics and Chemistry Work Lecture 4

Simple Machines Machines Lever Inclined plane Pulley Screw Wedge Wheel & axle.

Simple Machines & Mechanical Advantage RHS Technology Education.

Mechanical Advantage.

Simple machine force – distance trade-off:

ENERGY,WORK, POWER, AND MACHINES IPC Spring 2014.

1 Machines and Mechanical Systems. 2 How were the great pyramids built? How can giant buildings be made from objects too heavy to carry? Up until relatively.

Name ________________________________ Physical Science

Simple Machines They make life easy breezy…. Simple Machines Ancient people invented simple machines that would help them overcome resistive forces and.

In science, the word work has a different meaning than you may be familiar with. The scientific definition of work is: using a force to move an object.

Mechanical Advantage and Efficiency

Simple Machines Simple Machines Making Work Easier….YEAH!!!

Simple Machines.

Simple Machines Simple Machines Matt Aufman and Steve Case University of Mississippi NSF NMGK-8 February 2006 Matt Aufman and Steve Case University of.

Simple Machines. I. The simple machine A. Types of Simple Machines… 1. Lever 2. Pulley 3. Wheel and axle 4. Screw 5. Wedge 6. Inclined plane.

Wedge Inclined Plane Screw Wheel and Axle Lever Pulley.

MACHINES and EFFICIENCY

Mechanical Advantage What do simple machines do for us anyway?

Simple Machines Spring 2014.

Topic 9 Simple Machines.

1 Simple Machines Ancient people invented simple machines that would help them overcome resistive forces and allow them to do the desired work against.

Simple Machines There are 6 basic simple machines.

Simple Machines Foldable

Machines. Simple Machines  Work out is less than or equal to Work in.  Force out can be greater than Force in.

Physical Science Chapter 14 Review Game. Work and Power EfficiencyMachines Mechanical Advantage 1 point 1 point 1 point 1 point 1 point 1 point 1 point.

Simple Machines & Mechanical Advantage

Mechanical Advantage and Efficiency

JEOPARDY – work and Simple Machines Final Jeopardy Simple Machines.

Simple Machines All mechanical devices consist completely of two machines: Lever Incline The purpose of any machine is to make Work easier for humans to.

Work and Machines Chapter 5. What machines do you use in your life to help you do some type of work?

Simple Machines W O R K M e c h a n i c a l A d v a n t a g e Force Effort E f f i c i e n c y 1.

Chapter 14 Review Game. Question A mechanical watch is an example of this.

How Machines do WORK A Machine – is a device that allows you to do work in a way that is easier or more effective. INPUT FORCE – is the force you exert.

Systems In Action Mechanical Advantage

Simple Machines LeversPulleys Inclined Plane Simple Machines Can multiply or change the direction of an applied force.

Work, Power, & Simple Machines. Work Work is done when a force causes an object to be displaced.  The object must be displaced (moved) for work to take.

Efficiency and Simple Machines

14.3 Mechanical Advantage and Efficiency

Practice Problems Work and Mechanical Advantage

Mechanical Advantage and Efficiency

MACHINES and EFFICIENCY

Simple Machine Quiz Review

What do simple machines do for us anyway?

What do simple machines do for us anyway?

Mechanical Advantage and Efficiency

Practice Problems Work and Mechanical Advantage. 1. How much work is done on a 10 N block that is lifted 5 meters off the ground by a pulley? Answer 50.

Simple Machines.

Chapter 14-3 Notes Name: ___________________

Mechanical Advantage and Efficiency

Simple Machines: More Practice

Levers and Torque: More Practice

Presentation transcript:

Simple Machines Mechanical Advantage

Ideal Mechanical Advantage:  Is the mechanical advantage of an “ideal machine”  Theoretical value  The IMA for a pulley is equal to the number of supporting ropes.

A lever is used to move a rock. The resistance distance if 20cm and the effort distance is 120cm. What is the IMA?

A lever has an IMA of 5. Find the distance the effort arm must be pushed down in order to lift a 5kg mass 25cm up.

Calculate the IMA for each simple machine.

Actual Mechanical Advantage:  Is the mechanical advantage of a real machine  Actual value  IMA will always be higher than AMA due to friction.

 Lifting an object, AMA will always be less than IMA because working against gravity  But if you are lowering an object, AMA will be greater than IMA because gravity (friction) is helping

To move a rock with a weight of 100N, an effort force of 18N is needed. If a lever is used, calculate the AMA.

A lever with an AMA of 4 is used to lift mass of 5kg. How much effort force is needed?

 For a machine to be 100% efficient: IMA = AMA So…

A ramp is used to slide a 350kg piano onto the back of a pickup truck. a)Calculate the IMA b)Calculate the AMA c)Is this 100% efficient?

Not 100% efficient b/c IMA = AMA

A crowbar is used as a lever to pry a board loose. A boy applies an effort force at a distance of 0.8m from the fulcrum. The resistance force acts 0.2m from the fulcrum. a)Calculate the IMA. b)Assuming friction is negligible, what is the resistance force if the boy pushes with a force of 225N?

IMA = AMA

You need to lift a 100kg load by applying a force less than 980N. Ignoring friction, which of the following machines should NOT be chosen?

The great pyramid of Cheops is 146m high. Workers used large stones to build this structure, each with a mass of 900kg. Egyptologists believe that ramps were used to raise the stones to the height needed. It is thought that 6 workers, each pushing with 400N of force, could accomplish this task. Neglecting friction, what would be the length of the ramp needed to get each stone to the top of the pyramid?