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Q.

A ball is thrown up with a certain velocity at an  angle θ to the horizontal. The kinetic energy KE of  the ball varies with height h as

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a

b

c

d

answer is A.

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Detailed Solution

K = K0 -mgh; Here K = kinetic energy at height h,K0 = initial kinetic energy. Variation of K with h is linear.  At highest point, kinetic energy is not zero.
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