A sphere of mass m, impinges obliquely on a sphere of mass M which is at rest. The directions of motion of the sphere make an angle x with each other after impact. If m = e M

Q: A sphere of mass m, impinges obliquely on a sphere of mass M which is at rest. The directions of motion of the sphere make an angle x with each other after impact. If m = e M (where, e is coefficient of restitution), then x is

(a) π/3

(b) π/2

(c) π/6

(d) π/4

Ans: (b)