A steel ball of radius 2 cm is at rest on a frictionless surface. Anot – McqOptions

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1.	A steel ball of radius 2 cm is at rest on a frictionless surface. Another ball of radius 4cm moving at a velocity of 81 cm/sec collides elastically with first ball. After collision the smaller ball moves with speed of [RPMT 1999]
A.	81 cm/sec
B.	63 cm/sec
C.	144 cm/sec
D.	None of these
Answer» D. None of these

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