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A smooth solid sphere A of radius R and of mass m moves on a frictionless horizontal plane surface with an angular speed ω and with a velocity v of center of its mass. v and ω need not be related. The sphere may or may not be rolling. It collides perfectly elastically head on with another identical sphere B at rest. Neglect friction every where between any two surfaces.

After the collision, their angular speeds are ωA and ωB, respectively. Then what is true among these following:

(A) ωA < ωB (B) ωA = ωB (C) ωA = ω (D) ωB = ω

What is the linear velocity of sphere A and what is the linear velocity of sphere B.

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by askquestion

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