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Q.

A ball impinges directly upon another ball at rest and is itself brought to rest by the impact. If half of initial kinetic energy is destroyed in the collision, thecoefficient of restitution is

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a

0.3

b

0.4

c

0.5

d

06

answer is C.

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Detailed Solution

Here u2=0,v1=0from conservation of momentumm1u1=m2v2      (1)and from given condition1212m1v12=12m2v22dividing equation (2) by (1)Coefficient of restitutionV2V1=12=0.5
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