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- 1. Multiple ChoiceA girl on a motorbike passes by at a speed of 15 m/s. Her mass is 40 kg. What is her kinetic energy?300 Joules600 Joules950 Joules4500 Joules
- 2. Multiple ChoiceCalculate 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
- 3. Multiple Choice
Which character has the greatest gravitational potential energy?Character ACharacter BCharacter CCharacter D - 4. Multiple ChoiceWhich skier has the greatest kinetic energy?Skier ASkier BSkier CSkier D
- 5. Multiple ChoiceAccording to the Law of Conservation of Energy, energy cannot be _________ or ____________.destroyed, destroyedcreated, savedcreated, destroyedlost, found
- 6. Multiple Choice
What is the KE at the bottom?
15,000 J
3,750 J
7,500 J
11,250 J
- 7. Multiple Choice
Pratik can carry 300N load and walks a distance of 100m in 50 seconds. What is the power of Pratik?
600 W
1000000 W
400 W
25 W
- 8. Multiple Choice
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
- 9. Multiple Choice
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
- 10. Multiple Choice
You do 90 joules of work in 20 seconds. How much power have you generated?
45 watts
4.5 watts
3 watts
30 watts
- 11. Multiple Choice
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
- 12. Multiple Choice
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
- 13. Multiple Choice
Pat spent 200 seconds pushing on this wall and exerted 150 N. How much work did they do?
1.33 W
30,000 W
30,000 J
0 J
- 14. Multiple Choice
A typical internal combustion engine only converts 20-40% of the potential energy stored in fuel to the mechanical movement of the car. Where does a majority of the energy go?
Light Kinetic
Heat Kinetic
Elastic Potential
Gravitational Potential
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