Energy Work Power

Calculate the potential energy of a roller coaster at the top of a 72 m hill that has a mass of 112 kg.

• 80640 J

• 790,720 J

• 8,640 J

• 790,700 J

Which character has the greatest gravitational potential energy?

• Character A

• Character B

• Character C

• Character D

Tags

NGSS.MS-PS2-4

NGSS.MS-PS3-2

Which skier has the greatest kinetic energy?

• Skier A

• Skier B

• Skier C

• Skier D

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-4

What is the KE at the bottom?

• 15,000 J

• 3,750 J

• 7,500 J

• 11,250 J

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-4

The rate at which work is done is ____.

• power

• force

• efficiency

• momentum

A kid applies a force of 60 N to a ball over 1.2 meters. How much work did he do on the ball? 

• 77 J

• 72 J 

• 0.7 J 

• 772 J 

Tags

NGSS.MS-PS2-2

A weightlifter lifts three 300 newton weights 1.5 meters off the ground. How much work has he done?

• 900 J 

• 450 J

• 1350 J 

• 1200 J 

Tags

NGSS.MS-PS3-5

You do 90 joules of work in 20 seconds. How much power have you generated?

• 45 watts

• 4.5 watts

• 3 watts

• 30 watts

A runner exerts 222,000 J when she runs for 60 seconds. What is the runner's power?

• 3700 W

• 600 W

• 400 J

• 60 J

Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-5

You use 750 J of energy to push a sofa. If it took you 6 sec to move the sofa, what was your power?

• 125 W

• 4750 J

• 4750 W

• 190 W

Tags

NGSS.MS-PS3-1