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Question

A body is projected with kinetic energy E such that its range is maximum.Its potential energy at the maximum height is

A
4 K
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B
3 K
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C
2 K
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D
Zero
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Solution

The correct option is C 2 K
K.E = E = 12mu2; [θ=450]
P.E = mgh = mg(u2sin2θ2g)
P.E = (12mu2)sin245=E[12]2
P.E = E2

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