Work, Energy, and Power Review

The unit used to measure power is the 

• Watt
• Newton
• Joule
• Newton*meter

If you push a cart with a force of 60 N for 2 m, how much work have you done if the force was in the same direction as the displacement?

• 120 J
• 30 J
• 120 N 
• 30 N

Two movers applied a total force of 350 N to push chest up a ramp into a truck. If the work that they did 1,400 J, calculate the height of the ramp?

• 4 m

• 3 m

• 2 m

• 1 m

This weight lifter required 1029.7 newtons of force to bring the weights to a height of approximately 2.31 m in 9 seconds. How much power did he have?

• 264 Watts

• 1029 Watts

• 2,377 Watts

• 4,009 Watts

Person A and Person B are both using the same amount of work to lift something. Person A takes half as much time to do it. Who has greater power.

• Person A

• Person B

Energy of a rock perched on a cliff is an example of...

• gravitational potential energy

• elastic potential energy

• chemical potential energy

• kinetic energy

Energy from a compressed spring would be an example of...

• kinetic energy

• elastic potential energy

• gravitational potential energy

• chemical potential energy

The SI unit of work

• Joules

• Watts

• Newtons

• meters

The SI unit for power

• Watts

• Joules

• Newtons

• Meters

Gravitational potential energy depends on the ________ and ________ of the object.

• Height and mass

• Spring constant and Distance away from equilibrium

• Mass and Velocity

• Height and Friction