Work & Power Flashcard

Front

What is the definition of work in physics?

Back

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

Front

What is the formula for calculating work?

Back

Work = Force x Distance (W = F x d) where W is work in joules, F is force in newtons, and d is distance in meters.

Front

What is power in the context of physics?

Back

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

Front

What is the formula for calculating power?

Back

Power = Work / Time (P = W / t) where P is power in watts, W is work in joules, and t is time in seconds.

Front

If a girl weighs 400 N and runs up a flight of stairs of height 5 m in 4 seconds, what is her power?

Back

500 W.

Front

What is the unit of work?

Back

The unit of work is the joule (J).

Front

What does 14J represent in physics?

Back

14J is an example of work.

Front

How much work is done when a force of 70N is applied over a distance of 1.1 meters?

Back

77 joules.

Front

What is the relationship between work, force, and distance?

Back

Work is done when a force causes an object to move a certain distance in the direction of the force.

Front

In which scenario is work being done?

Back

Work is done when a force causes displacement. For example, lifting an object vertically.