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Question

A stone of mass 6kg is revolved in a vertical circle of diameter 6m, such that its speed at a point is minimum . If the K.E at the same point is 250J , then the P.E. at this point is

A
200J
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B
150J
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C
100J
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D
450J
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Solution

The correct option is A 200J
Given: K.E=250 J
But, T.E.=52mgr=450 J
P.E.=450250=200 J

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