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a
momentum is conserved in elastic collisions but not in inelastic collisions
b
during an elastic collision , total kinetic energy is conserved but momentum is not conserved .
c
during an elastic collision, total kinetic energy is not conserved but momentum is conserved .
d
kinetic energy and momentum both are conserved in all types of collisions
answer is C.
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Detailed Solution
During an elastic collision, the momentum is conserved while total K.E. is not conserved as dduring the contact period , a part of kinetic energy is converted in elastic potential energy.