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Applications of Horizontal and Vertical Components

A cricket bal...

Question

A cricket ball is hit at $30^{0}$ with the horizontal with kinetic energy . The kinetic energy at the highest point is

A

Zero

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B

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C

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D

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Solution

The correct option is D
Kinetic energy at the highest point

$K^{'} = K c o s^{2} θ = K c o s^{2} 30 = K {(\frac{\sqrt{3}}{2})}^{2} = \frac{3 K}{4}$

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