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Q.

The kinetic energy of a projectile at the highest point of its path is found to be 3/4th of its initial kinetic energy. If the body is projected from the ground, the angle of projection is

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a

0o

b

30o

c

60o

d

40o

answer is B.

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Detailed Solution

K.Etop=34K.Ei;12mu cosθ2=3412mu2

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