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Q.

Two particles of masses m and 4m have kinetic energies in the ratio of 2:1. What is the ratio of their linear momenta?

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a

12

b

12

c

14

d

116

answer is A.

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Detailed Solution

Given (KE)1=12m1v12=2K and (KE)2=12m2v22=K, so that m1v12m2v22=2m12v12m22v22=2m1m2p1p2=2m1m2=24=12 ∵m2=4m1Hence the correct choice is (a)
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