Work and Power

Front

What is Work?

Back

Work is done when a force is applied to an object and the object moves in the direction of the force.

Front

What is Power?

Back

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

Front

What is Energy?

Back

Energy is the capacity to do work or the ability to cause change.

Front

What are the conditions for work to be done?

Back

1. A force must be exerted. 2. The object must move. 3. The object must move in the same direction as the force.

Front

Is holding a heavy object above your head considered work?

Back

No, because the object is not moving.

Front

Is talking on the phone to someone in distress considered work?

Back

No, because there is no movement of an object.

Front

What is the formula for calculating work?

Back

Work = Force x Distance.

Front

What unit is work measured in?

Back

Work is measured in Joules (J).

Front

What unit is power measured in?

Back

Power is measured in Watts (W).

Front

How is power calculated?

Back

Power = Work / Time.