Work and Power

Front

What is the unit used to measure power?

Back

Watt

Front

Is work done when a weightlifter holds a barbell still above his head?

Back

False

Front

If 150 Joules of work is needed to move a box 10 meters, what force was used?

Back

15 N

Front

If 68 W of power is produced in 18 seconds, how much work is done?

Back

1,224 J

Front

What is the amount of work done in a certain amount of time known as?

Back

Power

Front

Define work in physics.

Back

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

Front

What is the formula for calculating power?

Back

Power = Work / Time

Front

What is the relationship between work and energy?

Back

Work is a transfer of energy; when work is done, energy is transferred from one system to another.

Front

What is the SI unit of work?

Back

Joule (J)

Front

How is power related to force and velocity?

Back

Power = Force x Velocity