Calculating Work & Power

Front

What is work in physics?

Back

Work is defined as the force applied to an object times the distance the object moves in the direction of the force. It is measured in joules (J).

Front

How is work calculated?

Back

Work (W) = Force (F) × Distance (d) where force is in newtons and distance is in meters.

Front

What is power in physics?

Back

Power is the rate at which work is done or energy is transferred. It is measured in watts (W).

Front

How is power calculated?

Back

Power (P) = Work (W) / Time (t) where work is in joules and time is in seconds.

Front

If a book weighing 1.0 newton is lifted 2 meters, how much work is done?

Back

2 J

Front

What happens when a force is applied to an object?

Back

The object moves.

Front

What is the unit of work?

Back

The unit of work is the joule (J).

Front

What is the unit of power?

Back

The unit of power is the watt (W).

Front

If a force of 35 newtons is used to push a box a distance of 10 meters in 5 seconds, how much power is used?

Back

70 watts

Front

What is the relationship between work and power?

Back

Power is the amount of work done per unit of time.