Chapter 9 Test: Work, and Simple Machines

Front

What is the definition of work in physics?

Back

Work is done when a force causes an object to move in the direction of the force. It is calculated as Work = Force x Distance.

Front

What is the unit of work?

Back

The unit of work is the Joule (J).

Front

What is the formula for calculating power?

Back

Power = Work / Time (P = W/t).

Front

What is the definition of power in physics?

Back

Power is the rate at which work is done or energy is transferred.

Front

What is the relationship between work and energy?

Back

Work done on an object results in a change in energy of that object.

Front

Is work done when a force is applied but there is no movement?

Back

No, work is only done when there is movement in the direction of the force.

Front

What is the formula to calculate work done?

Back

Work = Force x Distance (W = F x d).

Front

What is a simple machine?

Back

A simple machine is a device that makes work easier by allowing us to apply force in a more efficient way.

Front

Name the six types of simple machines.

Back

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

Front

What is an example of a lever?

Back

A seesaw is an example of a lever.