Work and Power Problems

Front

What is Work in physics?

Back

Work is defined as the product of force and the distance over which that force is applied. It is measured in joules (J).

Front

What is the formula for calculating Work?

Back

Work = Force x Distance

Front

What is Power in relation to Work?

Back

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

Front

What is the formula for calculating Power?

Back

Power = Work / Time

Front

How is Work related to energy?

Back

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

Front

If a force of 10 N moves an object 5 m, how much work is done?

Back

Work = 10 N x 5 m = 50 J

Front

What is the unit of Power?

Back

The unit of Power is the watt (W), where 1 W = 1 J/s.

Front

If you do 120 J of work in 4 seconds, what is your power output?

Back

Power = Work / Time = 120 J / 4 s = 30 W

Front

What is the relationship between Work and distance?

Back

Work increases with greater distance if the force remains constant.

Front

What happens to Power if the time taken to do the same amount of Work is halved?

Back

Power doubles because Power = Work / Time.