Asked by pcoolboy | 21st Dec, 2009, 07:57: PM
We'll assume that initial position A means the bob is at rest and the farthest left position is when the bob is horizontal.
Then the displacement is equal to the string length i.e. 1 m.
Work done = force x displacement
= mg x 1m
= 10 J
Answered by | 21st Dec, 2009, 10:22: PM
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