JEE Main Physics question
On the centre of a frictionless table, a small hole is made, through which a weightless string of length is inserted. On the two ends of the string, two balls of the same mass are attached. The arrangement is made such that half of the string is on the table top and half is hanging below. The ball on the table top is made to move in a circular path with constant speed . What is the centripetal acceleration of the moving ball?
Answer: (B)
Solution
The hanging ball is in equilibrium, so the string tension . The same tension supplies the centripetal force for the ball on the
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