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Projectile Time, Height and Range

A particle is...

Question

A particle is projected making angle $45^{\circ}$ with horizontal having kinetic energy K. The kinetic energy at highest point will be

A

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B

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C

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D

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Solution

The correct option is B
Kinetic energy at the highest point $K^{^{'}} = K c o s^{2} θ = K c o s^{2} 45^{\circ} = \frac{K}{2}$

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