A cricket ball is hit at 3 0 ∘ with horizontal with kinetic energy K . The kinetic energy at the highest point is

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TestHub · Accepted Answer

K = 2 1 ​ m u 2 u x ​ = u cos 3 0 ∘ K h ​ = 2 1 ​ m ( u cos 3 0 ∘ ) 2 = 2 1 ​ m u 2 cos 2 3 0 ∘ K h ​ = K ( 2 3 ​ ​ ) 2 = K ( 4 3 ​ ) = 4 3 K ​

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