Questions
One end of a light string of length l is tied to a small sphere and the other end is attached to a fixed point O at the ceiling of a room. The sphere is gently released from rest when the string is horizontal. When the string is vertical, acceleration of the sphere is
detailed solution
Correct option is A
(1)The sphere will follow a vertical circular path. At its lowest position, is speed is V.Conserving energy, 12 mV2=mgl ⇒ V=2gl∴ Acceleration at B, an=V2l=2gll=2gTalk to our academic expert!
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A pendulum of length / = l m is released from . The rate of change of speed of the bob at is (g = 10 )
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