Work and Power

Front

What is Work in physics?

Back

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

Front

What is Power in physics?

Back

Power is the rate at which work is done or energy is transferred. It is calculated as Power = Work / Time.

Front

If no movement occurs, what is the work done?

Back

If there is no movement, the work done is 0 Joules, regardless of the force applied.

Front

How do you calculate the power if you know the work done and the time taken?

Back

Power = Work / Time.

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), where 1 Watt = 1 Joule/second.

Front

If a force of 15 N moves an object 10 meters, how much work is done?

Back

Work = Force x Distance = 15 N x 10 m = 150 Joules.

Front

What information do you need to calculate power when moving an object?

Back

You need to know the amount of work done and the time taken to do that work.

Front

How much work is done if a 12 N box is lifted 5 meters?

Back

Work = Force x Distance = 12 N x 5 m = 60 Joules.

Front

What is the relationship between work and energy?

Back

Work is a transfer of energy. When work is done on an object, energy is transferred to that object.