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Two bodies of mass and 4m have equal kinetic energy. What is the ratio of their momentum?

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+1 vote
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in Engineering Physics I by (558k points)
Two bodies of mass and 4m have equal kinetic energy. What is the ratio of their momentum?

(a) 1:4

(b) 1:2

(c) 1:1

(d) 2:1

I have been asked this question in an internship interview.

My question is taken from Work Done in division Kinematics of Engineering Physics I

1 Answer

+1 vote
by (1.4m points)
Right choice is (b) 1:2

To explain I would say: p = √2mK

For same K, p1/p2 = √(m1/m2) = √(m/4m) = 1/2 = 1:2.

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