Question

two bodies of equal masses move with uniform velocity v and 3V respectively find the ratio of their kinetic energies​

Answer 1

K.E= 1/2 mv^2

Therefore

K/K'= 1^2/3^2= 1:9

Answer 2

Here is your answer!!!!

KE is proportional to (velocity)^2

KE1: KE2 =( v)^2:(3v)^2

KE1:KE2 = 1:9