Work and Simple Machines Quiz

What is work?

• A pull or a push

• Applying a pull or a push to move something

• The rate at which a force is applied to an object

• The rate at which energy is used to apply a force to an object

Work is measured in:

• Meters

• Newtons

• Joules

• Seconds

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How much energy does a person use in order to perform 100 Joules of work?

• 50 Joules of energy

• 100 Joules of energy

• 200 Joules of energy

• A person doesn’t use energy to perform work

The rate at which work is done is ____.

• power
• force

• energy

• time

What is a simple machine?

• A tool that reduces the amount of work performed

• A tool that increases the amount of work performed

• A tool that makes it easier to perform work

Which simple machine can help you raise an object?

• An inclined plane

• A pulley

• A lever

• All of these

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Which simple machine converts a downward force into a horizontal force, which is useful in splitting an object into two parts?

• An inclined plane

• A wedge

• A pulley

• A screw

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Which simple machine helps connect objects together?

• A wedge

• A screw

• A lever

• A pulley

What happens to the number of times you must rotate a screw in order to drive it into an object when you increase the number threads on the screw?

• You must rotate the screw more times and apply a stronger force

• You must rotate the screw more times but can apply a smaller force

• You will rotate the screw fewer times but must apply a stronger force

• You will rotate the screw fewer times and can apply a smaller force

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What do you call the pivot point on a lever?

• The input force

• The output force

• The fulcrum

• The angle