Simple Machines Review

What simple machine can be used to lift a weight? It has a fulcrum, generally in the middle of the machine.

• Inclined plane

• Lever

• Pulley

• Wheel and axle

Identify ALL the levers below! Hint: there are three!

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What is the function (job) of a pulley?

• To lift heavy objects with lots of effort

• To pull ropes upwards

• To push down on one end to lift the other

• To lift heavy objects with less work

Identify ALL the pulleys! Hint: there are two!

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The tradeoff of using a pulley is that it's easier to lift BUT you have to...

What is the function (job) of a wheel and axle?

• To make it harder to roll things

• To use pull downwards to lift things up

• To push objects up a ramp instead of lifting

• To decrease friction and make it easier to push objects

Identify ALL the examples of wheel and axles. Hint: there are three!

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What is the function (job) of an inclined plane?

• To move objects up/down with less force

• To move objects up/down with more force

• To lift objects up with less force

• To roll objects with less friction

Identify ALL the inclined planes! Hint: there are three!

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What is the tradeoff of using an inclined plane? You use less force as you walk but...