Physics - Work and Power Practice Problems

Front

What is Work in Physics?

Back

Work is done when a force causes an object to move. It is calculated using the formula: Work = Force x Distance (W = F x d). The unit of work is Joules (J).

Front

How do you calculate Work?

Back

Work is calculated using the formula: Work = Force x Distance. For example, if a force of 10N moves an object 5 meters, the work done is 10N x 5m = 50J.

Front

What is Power in Physics?

Back

Power is the rate at which work is done. It is calculated using the formula: Power = Work / Time (P = W / t). The unit of power is Watts (W).

Front

How do you calculate Power?

Back

Power is calculated using the formula: Power = Work / Time. For example, if 100J of work is done in 5 seconds, the power is 100J / 5s = 20W.

Front

What is the unit of Work?

Back

The unit of Work is Joules (J).

Front

What is the unit of Power?

Back

The unit of Power is Watts (W).

Front

If a force of 200N moves an object 20 meters, how much work is done?

Back

Work = Force x Distance = 200N x 20m = 4000J.

Front

If Amy pushes a lawn mower with a force of 20N for 10 meters, how much work does she do?

Back

Work = Force x Distance = 20N x 10m = 200J.

Front

A horse performs 15000 joules of work in 20 seconds. What is the horse's power?

Back

Power = Work / Time = 15000J / 20s = 750W.

Front

If it takes 50 seconds to do 10 Joules of work, how much power is required?

Back

Power = Work / Time = 10J / 50s = 0.2W.