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  4. A cricket ball is hit at 45° to the horizontal with kinetic energy K, the kinetic energy at the highest point is :

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Q. A cricket ball is hit at $45^{\circ}$ to the horizontal with kinetic energy $K$, the kinetic energy at the highest point is :

Punjab PMETPunjab PMET 2004Work, Energy and Power

Solution:

Kinetic energy at highest point
$K_{\text {hight }}=K \cos ^{2} 45^{\circ}=\frac{K}{2}$