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Work, Energy, and Power — Physics STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 SciencePhysicsWork, Energy, and Power1 Mark
MCQ
A ball hits a floor and rebounds after an inelastic collision. In this case:
  • A
    The total energy of the ball and the earth remains the same.
  • B
    The total momentum of the ball and the earth is conserved.
  • C
    The momentum of the ball just after the collision is same as that just before the collision.
  • D
    The mechanical energy of the ball remains the same during the collision.
✓

Answer

  1. The total energy of the ball and the earth remains the same.
  2. The total momentum of the ball and the earth is conserved.

Explanation:

As the collision is inelastic, body losses some energy, so that KE of ball does not remain the same. However, total energy and total momentum of ball and earth remain the same.

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