Gravitational Potential Energy

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5.3Gravitational Potential Energy

Gravitational Potential Energy Revision Questions

1. What happens with the gravitational potential energy of a 5 kg object if it moves according the trajectory shown in the figure? Take g ≈ 10 m/s2.

Physics Tutorials: This image provides visual information for the physics tutorial Gravitational Potential Energy
  1. Increases by 700 J
  2. Increases by 600 J
  3. Decreases by 100 J
  4. Increases by 850 J

Correct Answer: B

2. A 3 kg object falls from 24 m above the ground as shown in the figure. What is the velocity of this object when it touches the ground? Ignore the air resistance. Take g ≈ 10 m/s2.

Physics Tutorials: This image provides visual information for the physics tutorial Gravitational Potential Energy
  1. 21.9 m/s
  2. 15.5 m/s
  3. 26.8 m/s
  4. 19.0 m/s

Correct Answer: A

3. A 1 kg object moves according the trajectory shown in the figure.

Physics Tutorials: This image provides visual information for the physics tutorial Gravitational Potential Energy

What is the velocity of the object when it is at ground level? Take g ≈ 10 m/s2 and ignore all kinds of resistive forces.

  1. 11.1 m/s
  2. 7.9 m/s
  3. 2 m/s
  4. 0

Correct Answer: A

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