question_answer

A sphere of mass m moving with a constant velocity u hits another stationary sphere of the same mass. If e is the coefficient of restitution, then the ratio of the velocity of two spheres after collision will be                [RPMT 1996; BHU 1997]

A)          \[\frac{1-e}{1+e}\]

B)          \[\frac{1+e}{1-e}\]

C)          \[\frac{e+1}{e-1}\]      

D)          \[\frac{e-1}{e+1}{{t}^{2}}\]