Power Work and Energy Unit Review

Potential energy depends on the ________ and ________ of the object.

• Height (position)

• Mass

• Speed

• Friction

Which point has the most potential energy?

• G

• F

• B

• A

What is energy?

• rate of work
• Motion of an object
• ability to do work
• force over time

Kinetic energy depends on the ________ and ________ of the object.

• Height (position)

• Mass

• Speed

• Friction

Which of the following objects has the most kinetic energy?

• A 20 kg toddler running at 5 m/s
• A 50 kg toddler running at  30 m/s
• A 90 kg toddler running at 30 m/s
• A 100 kg  toddler running at 2 m/s

At which point in the picture must the cart have the most MECHANICAL energy?

• Point 1

• Point 2

• Point 3

• They would all be the same

How much power is used when 9000 J of work are done in 0.5 seconds?

• 4,500 W

• 18000 W

• 9453 W

• 917.4 W

This weight lifter raised 105 kg to a height of approximately 2.31 m in 9 seconds. How much power did he developed?

• 264 Watts

• 1029 Watts

• 2,377 Watts

• 4,009 Watts

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

Two people are lifting the same weight as shown in the animation. If they both do 10 reps, who will supply the most power?

• Bro A

• Bro B

• They both will do the same work

• Can't tell without knowing the weight they are lifting