Centre of Mass 3 Question 18
21. A ball hits the floor and rebounds after an inelastic collision. In this case,
(1986, 2M)
(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
(c) the total momentum of the ball and the earth is conserved
(d) the total mechanical energy of the ball and the earth is conserved
Numerical Value
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Answer:
Correct Answer: 21. (c)
Solution:
- In an inelastic collision, only momentum of the system may remain conserved. Some energy can be lost in the form of heat, sound etc.
