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Question

Same force acts on two bodies of masses m1 and m2 (m2> m1). After travelling the same distance,

A
Kinetic energy of m2 is greater than kinetic energy of m1
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B
Kinetic energy of m1 is greater than kinetic energy of m2
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C
Ratio of kinetic energies of those two is equal to ratio of their momentum
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D
Kinetic energy of m1 is equal to kinetic energy of m2
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Solution

The correct option is D Kinetic energy of m1 is equal to kinetic energy of m2
s=12at2
Now, K.E1=12m1(at)2=12m1a1sa1=F.s
K.E2=12mg(a2t)2=F.s
i.e K.E1=KE2

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