Question

Two bodies of equal masses move with the uniform velocities 2 and 4respectively. Find the ratio of their kinetic energies.

Answer 1

v1=2v

v2=4v

m1=m2=m

KE1=1/2*m*v1²

=1/2*m*4v²

KE2=1/2*m*v2²

=1/2*m*16v²

KE1/KE2=1/4

hope this helps