Two balls of equal masses roll with velocities v and 4v,respectively .What is the ratio of their Kinetic Energies?
2 answers
what is 4^2 ? Greater velociyt means greater KE. KE=1/2 m v^2
KE1/KE2 = 0.5M*V^2/0.5M*(4V)^2 = V^2/16V^2 = 1/16.