Work, Energy and Simple Machines Pre-assessment

Front

What are the two main parts of a pulley?

Back

A pulley consists of a wheel and a wire.

Front

Which of the following is not a type of simple machine?

Back

A spring is not a type of simple machine.

Front

What type of simple machine is commonly found on the floor of a bathtub?

Back

An inclined plane is found on the floor of a bathtub.

Front

What is work in physics?

Back

Work is a force that moves an object.

Front

True or False: The more power you use to move an object, the more work you do.

Back

False.

Front

What is a simple machine?

Back

A simple machine is a device that changes the direction or magnitude of a force.

Front

Name the six types of simple machines.

Back

The six types of simple machines are lever, wheel and axle, pulley, inclined plane, screw, and wedge.

Front

What is an example of a lever?

Back

A seesaw is an example of a lever.

Front

How does a pulley help in lifting objects?

Back

A pulley reduces the amount of force needed to lift an object by changing the direction of the force.

Front

What is the formula for calculating work?

Back

Work = Force x Distance.