The work done by the string of a simple pendulum in S.H.M is zero.why?
Asked by Alekhya K | 26th Dec, 2013, 02:15: PM
Expert Answer:
When a bob oscillates, the rstoring force mg sin 
is always perpendicular to the length of string. So work done by the string is zero.
is always perpendicular to the length of string. So work done by the string is zero.Answered by | 26th Dec, 2013, 03:54: PM
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