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An Intiative by Sri Chaitanya
a
The average elastic force acting on the ball is [m(u+v)]/Δt.
b
The average elastic force acting on the ball is [2m(u+v)]/Δt.
c
The kinetic energy of the ball increases by 2mu(u+v).
d
The kinetic energy of the ball remains the same after the collision.
answer is B.
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