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A 4 kg mass and 1 kg are moving with equal kinetic energies. The ratio of the magnitudes of their linear momenta is (a) 1: 2 (b) 1: 1 (c) 2: 1 (d) 4: 1



A 4 kg mass and 1 kg are moving with equal kinetic energies. The ratio of the magnitudes of their linear momenta is


        (a)    1: 2


        (b)    1: 1


        (c)    2: 1  


(d)    4: 1


Grade:11

1 Answers

Navjyot Kalra
askIITians Faculty 654 Points
7 years ago

(c)
E = 1/2 mv2. Hence, mv = (2mE)1/2.
For same
KE, momentum ? √m.
Hence, the ratio is 2:1.

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