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Q.

A stationary particle explodes into two pieces of masses m1 and m2 which move in opposite directions with velocities v1 and v2. The ratio of their kinetic energies E1/E2 is

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a

1

b

m2/m1

c

m1−v2/m2v1

d

m1/m2

answer is C.

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Detailed Solution

They will have same momentum but in opposite
direction. 
So kinetic energy – p2/2m is inversely proportional to
mass –
E1E2=m2m1

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