Question

Two bodies of masses m and 4m are moving with equal kinetic energies. the ratio of their velocities which they are travelling is

Answer 1

Since K.E= 1/2 mv^2

Comparing. m1 v1^2 = m2 v2^2

√m1 / m2 = v2/v1

V2/V1 = √m/4m (m gets cancelled)

V2/V1= √1/4

V2/V1 = 1/2

Reciprocal. V1 / V2 = 2