Question

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

Answer 1

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.