Work and Power

Front

What is the definition of work in physics?

Back

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

Front

Does pushing against an immovable object count as work?

Back

No, work isn't done if the object does not move.

Front

What is power in the context of physics?

Back

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

Front

If two people do the same amount of work, but one does it in less time, who has greater power?

Back

The person who does the work in less time has greater power.

Front

What is the formula for calculating power?

Back

Power = Work / Time.

Front

Is it possible to have high power with low work?

Back

Yes, if the work is done in a very short amount of time, power can be high even if the total work is low.

Front

What are the two types of forces?

Back

Push and pull.

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.

Front

Can energy be transformed without doing work?

Back

Yes, energy can be transformed in processes that do not involve work, such as heat transfer.

Front

What unit is work measured in?

Back

Work is measured in joules (J).