A bob of mass ‘m' of simple pendulum oscillates from point a to point c and back. B is the mean position for this bob. If the point a and c are ‘h' height above from the point b and the point b is ‘h' height above from the ground, then the speed of the bob at point b will be?
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since oscillation starts from pt A so velocity at pt A is zero
we take as reference that P.E. at ground is zero
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here is answer
answer is root 2gh
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