When a ball hits a floor and rebounds after an inelastic collision,
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a
the momentum of the ball just before collision is equal to its momentum just after the collision
b
the total mechanical energy of the ball just before collision is equal to its total mechanical energy after the collision
c
the momentum of the ball and earth is conserved
d
all the above are true
answer is C.
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Detailed Solution
all 3 types of collision linear momentum of the system ( ball and earth) is conserved. In inelastic collisions, mechananical energy is converted into other forms of energy.