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
Text Solution
Verified by ExpertsThe correct answer is:
C
Ratio in radius of steel balls = 1/2
So, ratio in their masses 
[As 
]
Let 
and 
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