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Q.

A particle of mass m moving with certain velocity collides elastically head on with a particle of mass 3m at rest. The percentage of K.E. transferred is

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a

36%

b

25%

c

75%

d

16%

answer is C.

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Detailed Solution

4m1m2(m1+m2)2×100=4×m×3m(4m)2×100             4×316×100=75%
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