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5.work,energy,power and collision — Physics STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 SciencePhysics5.work,energy,power and collision1 Mark
MCQ
A ball hits the floor and rebounds after inelastic collision. In this case
  • A
    The momentum of the ball just after the collision is the same as that just before the collision
  • B
    The mechanical energy of the ball remains the same in the collision
  • ✓
    The total momentum of the ball and the earth is conserved
  • D
    The total energy of the ball and the earth is conserved
✓

Answer

Correct option: C.
The total momentum of the ball and the earth is conserved
c
(c)By the conservation of momentum in the absence of external force total momentum of the system (ball + earth) remains constant.

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