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JEE · NEET Previous Year Question

$Three bodies A, B and C have equal kinetic energies and their masses are 400 g . 1.2 kg and 1.6 kg respectively. The ratio of their linear momenta is:$

Topic: JEE PYQ

Answer: B. Full step-by-step solution below.

A $2; 3; 1$
B $1 : 3 : 2$
C $1 : 3 : 2$
D $3 : 2 : 1$

Correct answer: B

Solution

(b) KE = \frac{P ^{2}}{2 m} P \propto m Hence, P_{A} : P_{B} : P_{C} = 400 : 1200 : 1600 = 1 : 3 : 2

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