Q.

A ball hits the floor and rebounds after inelastic collision then 

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a

total momentum of ball and earth is conserved

b

momentum of ball is conserved

c

total KE of ball and earth is conserved

d

mechanical energy of ball remains same in collision

answer is C.

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Detailed Solution

When the ball hits the floor and rebounds after inelastic collision total momentum of ball and earth is conserved the colliding bodies undergo deformation in its shape and size.

So K.E is not conserved.

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