Question

Two bodies of equal masses move with uniform velocities v and 4v, respectively. What is ratio of their K. E.?

Answer 1

Mass of the bodies is same, therefore:

KE is proportional to the square of their velocities.

=> KE(1) = K.v*v, KE(2) = K.(4v)*4v)

KE(2) = 16KE(1)

KE(2)/KE(1) = 16.

Answer 2

Answer:

Explanation:

linear momentum of P = mv

linear momentum of Q = (4m)(4v) = 16mv

ratio of momentum = mv/16mv = 1/16

ratio of momentum of P and Q = 1 : 16