A sphere of mass $m$ travelling at constant speed $v$ strike another sphere of same mass. If coefficient of restitution is $e$, then ratio of velocity of both spheres just after collision is :-
A sphere of mass $m$ travelling at constant speed $v$ strike another sphere of same mass. If coefficient of restitution is $e$, then ratio of velocity of both spheres just after collision is :-
- A
$\frac{1-e}{1+e}$
- B
$\frac{1+e}{1-e}$
- C
$\frac{e+1}{e-1}$
- D
$\frac{e-1}{e+1}$
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