Work and Power

Front

What is Work?

Back

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

Front

Is it Work? Jessi pulls her suitcase along on her way to the airport.

Back

Work

Front

Is it Work? Belinda holds an extremely heavy box above her head.

Back

Not work

Front

Calculate Work: A kid throws a ball with a force of 70N over 1.1 meters. How much work did he do?

Back

77 joules (Work = Force x Distance = 70N x 1.1m)

Front

What does Work measure?

Back

Work measures how much effort is applied over a distance.

Front

Best example of Work being done: doing homework, lifting a box, pushing on a stationary box, holding a box.

Back

Lifting a box.

Front

What is Power?

Back

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

Front

Formula for Power?

Back

Power = Work / Time.

Front

What unit is Work measured in?

Back

Work is measured in joules (J).

Front

What unit is Power measured in?

Back

Power is measured in watts (W).