A particle is projected, making an angle of \( 45^{\circ} \) with t...

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A particle is projected, making an angle of \( 45^{\circ} \) with the horizontal and having kinetic energy \( \mathrm{K} \). The kinetic energy at the highest point will be :
1. \( \frac{K}{\sqrt{2}} \)
2. \( \frac{K}{2} \)
3. \( 2 \mathrm{~K} \)
4. \( \mathrm{K} \)
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