Difference between revisions of "Test 3.2"
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Latest revision as of 05:40, 3 June 2015
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