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A ball hits the floor and rebounds after an inelastic collision. In this case
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Verified Answer
The correct answers are:
the total energy of the ball and the earth is conserved.
The correct option is (4)
Momentum of the system changes only due to external force (or impulse). When a ball hits the floor and gets rebound, then no external force (Impulse) acts on the ball as well as the floor, thus total momentum of the "ball + earth" system remains conserved. Also, some of the mechanical energy of the ball is always lost in an inelastic collision due to its deformation, hence it cannot remain conserved in this collision.
Final Answer: (4).
Momentum of the system changes only due to external force (or impulse). When a ball hits the floor and gets rebound, then no external force (Impulse) acts on the ball as well as the floor, thus total momentum of the "ball + earth" system remains conserved. Also, some of the mechanical energy of the ball is always lost in an inelastic collision due to its deformation, hence it cannot remain conserved in this collision.
Final Answer: (4).
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