# Test 3.2

From Karnataka Open Educational Resources

2. If two bodies of equal masses move with uniform velocity of 'v' and '3v', what will be the ratio of their kinetic energies?

Solution: Mass of first body = m

Velocity of the first body = v Mass of second body = m Velocity of second body = 3v

The ratio of kinetic energies of the two bodies = (kinetic energies of first body)/(kinetic energies of second body)

=((1/2)mv2)/((1/2)m(3v)2) =1/9

Therefore the ratio of the kinetic energies = 1:9