Q.

Two bodies of masses m and 2m have same momentum. Their respective kinetic energies E1 and E2  are in the ratio

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a

1 : 2

b

2 : 1

c

1 : 2

d

1 : 4

answer is B.

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Detailed Solution

E=P22m. If momentum are same then E∝1m∴E1E2=m2m1=2mm=21
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Two bodies of masses m and 2m have same momentum. Their respective kinetic energies E1 and E2  are in the ratio