A car and a truck have the same speed of 30 ${{ms}^{-1}}$. If their masses are in the ratio of 1 : 3, find the ratio of their kinetic energies.

Given, vx = v2 = 30 ${{ms}^{-1}}$

According to question,${ m}*{ 1}$/
${ m}*{ 2}$ = 1/3

KE of Car / KE of Truck = m1/m2 =1/3