Momentum and CollisionEasy
Question
A sphere of radius 2 cm, moving with a velocity of 81 cm/s, collides with another sphere of radius 4 cm at rest. The collision is head−on and perfectly elastic. The velocity of the sphere at rest after the collision will be :-
Options
A.81 cm/s
B.18 cm/s
C.144 cm/s
D.Zero
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