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- 1. Multiple Choice
What kind(s) of energy is(are) in a person climbing a ladder?
Potential
Kinetic
Both
Need the mass of the person to determine.
- 2. Multiple Choice
As a pendulum swings from its highest to lowest position, what happens to its kinetic and potential energy?
The PE and KE increase and decrease together
The PE decreases while the KE increases
Impossible to know without knowing the mass
The PE and the KE decrease and increase together.
- 3. Multiple ChoiceAt which point is potential energy greatest?WXYZ
- 4. Multiple Choice
According to the Law of Conservation of energy, the amount of energy before and after a reaction must be the same. Which statement below is true?
The total amount of energy is conserved
The total amount of energy is less after a reaction
The total amount of energy is more after a reaction
Need the mass of the object to determine if energy is conserved.
- 5. Multiple Choice
When velocity triples, kinetic energy increases by ______ times. KE =1/2mv2
9
3
1.5
4.5
- 6. Multiple Choice
What is the Total Mechanical Energy at point A?
500,000 J
400,000 J
200,000 J
50,000 J
- 7. Multiple Choice
What is the Kinetic Energy at point B?
500,000 J
400,000 J
300,000 J
50,000 J
- 8. Multiple Choice
What is the Kinetic Energy at point C?
500,000 J
400,000 J
300,000 J
50,000 J
- 9. Multiple Choice
What is the Kinetic Energy at point D?
500,000 J
250,000 J
300,000 J
50,000 J
- 10. Multiple Choice
What is the GPE at point E?
500,000 J
250,000 J
300,000 J
100,000 J
- 11. Multiple Choice
What is the GPE at point F?
500,000 J
250,000 J
300,000 J
0 J
- 12. Multiple Choice
What is the KE at point F?
500,000 J
250,000 J
300,000 J
0 J
- 13. Multiple Choice
When something is dropped, what type of energy transfer takes place?
Kinetic -> Gravitational Potential
Gravitational Potential -> Kinetic -> Sound
Electrical -> Chemical
Heat -> Nuclear
- 14. Multiple Choice
If two marbles are rolled down a ramp from some height towards a container the _______ marble will move the container farther because it possess more _________ energy as it approaches the end of the ramp.
heavier, kinetic
heavier, potential
lighter, kinetic
lighter, potential
- 15. Multiple Choice
In diagram 2, if the mass of the car is 600 kg, what is the change in potential energy from point A to point B?
411,600 J
294,000
176,400 J
117,600 J
- 16. Multiple ChoiceIn diagram 2, if the 600 kg cart is initially at rest, what is its velocity at point B?19.8 m/s15.0 m/s10.3 m/s3.8 m/s
- 17. Multiple Choice
If a 0.5 kg ball is thrown up with 250 J of kinetic energy, how high will it go?
(HINT: At the ball's highest point it has stopped.)
KE = 1/2mv2 , PE = mgh
g = 9.8 m/s2
51 m
25.5 m
12.76 m
31.6 m
- 18. Multiple Choice
A cliff diver with a mass of 125 kg jumps off a 50m high cliff, how fast will he be traveling just before he hits the water? (His height at this point is 0m)
(HINT: Find PE first. then KE = 1/2mv2
g = 9.8 m/s2
61,250 m/s
980 m/s
31.3 m/s
247.5 m/s
- 19. Multiple Choice
A person with a mass of 60 kg jumps in the air. If the gravitational potential energy is 1,470 J at the highest point, how did they jump?
3.2 m
49 m
24.5 m
2.5 m
- 20. Multiple Choice
The rollercoaster has both PE and KE, but where will it have more PE than KE?
1
2
3
4
5
- 21. Multiple Choice
Where will the roller coaster have the most total mechanical energy? Check all that apply. Neglect friction and air resistance.
1
2
3
4
- 22. Multiple Choice
A book has 200J of potential energy and then it falls onto the floor. After it hits the floor and is sitting still, what happened to the energy?
It has disappeared.
It goes into the floor and book as thermal energy and sound.
It changes to chemical potential energy.
It turns into gravity.
- 23. Multiple Choice
The skateboarder shown above has a potential energy of 2,800 J and kinetic energy of 0J at a height of 4 meters. How much total mechanical energy will she have after 2 seconds? Neglect friction and air resistance.
2000J
1600J
1400J
2800J
- 24. Multiple Choice
This graph depicts what type of relationship between kinetic and potential energy?
Non-Linear
Linear
Inverse
Poly-atomic
- 25. Multiple Choice
A 5.0 kg object is pushed across the floor and the attached force vs. displacement graph describes the forces and displacement. What is the change in KE of the object? (Hint: Net work = change in kinetic energy)
45 J
30 J
735 J
40 J
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