Levers and Pulleys. Lever and Pulley Jeopardy DefinitionsLevers Pulleys Simple Machines Investigations 10 pt 20 pt 30 pt 40 pt 50 pt Bonus.

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Presentation transcript:

Levers and Pulleys

Lever and Pulley Jeopardy DefinitionsLevers Pulleys Simple Machines Investigations 10 pt 20 pt 30 pt 40 pt 50 pt Bonus

What is a fulcrum? The point where the lever arm moves.

What is a newton? The unit used to measure force

What is mechanical advantage? Reduces the force needed to lift a load and is the result of using a simple machine.

What is a pulley? A wheel with a grooved rim in which a rope can run to change the direction of the force that lifts the load.

What is a class-2 lever? When the load is in the middle and the fulcrum and effort are at the other end.

A pair of scissors is what class of lever? Class -2 Diagram on your white board

A hammer is what class of lever? A class-1 lever now diagram it on your white board

A pair of tweezers is what class of lever? Class-3 Now diagram the tweezers on your white board

A fishing rod is what class of lever A class-3 lever Diagram this lever on your white board

A nutcracker is what class of lever? Class-2 Diagram on your white board

What is a single-fixed pulley? Has a wheel that is attached to something above the load

Which Pulley system does not give advantage Pulley A

Which pulley systems will not work? A B C

Which pulley systems will work properly? W Y Z

What is a movable pulley Has a wheel that is attached to the load.

A cars tires when connected to the car are an example of what type of simple machine Wheel and axle.

In order to get the water to drain out of your bathtub you need this simple machine. What is an inclined plane

In the kitchen you use knives to chop and cut food. A knife is this type of simple machine What is a wedge?

We use light bulbs all over our houses. A light bulb is this type of simple machine. A screw.

Most of us use stairs everyday. A staircase it this type of simple machine. Inclines plane

On this day our question was: Does moving the effort effect the work? What is January 12, 2010

During this investigation we defined what a diagram was. What is Lever Diagrams

Our purpose of this investigation was to assemble and investigate one pulley systems. What is One Pulley Systems.

On this two-coordinate graph our position of our effort was 2.5cm what was our effort ? 9.8N

On the Measuring the Distance investigation this was our LOL. The benefits gained (making work easier) by using simple machines are always balanced by cost When the benefit out weighs the cost, the machine is a useful tool.

Bonus Question 6/LeversandPulleys/index.html 6/LeversandPulleys/index.html