Work and Power

Front

What is the formula for calculating work?

Back

Work (W) is calculated using the formula W = F × d, where F is the force applied and d is the distance moved in the direction of the force.

Front

What unit is work measured in?

Back

Work is measured in Joules (J).

Front

What is the definition of power in physics?

Back

Power is the rate at which work is done or energy is transferred, calculated as Power (P) = Work (W) / Time (t).

Front

What unit is power measured in?

Back

Power is measured in Watts (W), where 1 Watt = 1 Joule/second.

Front

Does pushing against an immovable object constitute work?

Back

No, work is only done when an object moves in the direction of the applied force.

Front

If a weightlifter holds a barbell still above his head, is work being done?

Back

No, since the barbell is not moving, no work is done.

Front

How does increasing the force affect the work done?

Back

Increasing the force applied increases the work done, assuming the distance moved remains constant.

Front

How does increasing the distance affect the work done?

Back

Increasing the distance over which a force is applied increases the work done, assuming the force remains constant.

Front

What is the relationship between work and energy?

Back

Work done on an object results in a change in energy; work can transfer energy to or from an object.

Front

If 68 Joules were necessary to move a 4 Newton crate, how far was the crate moved?

Back

The crate was moved 17 meters.