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Q.

Which one of the following statements is true ?

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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.
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