A particle of \( m=2 \mathrm{~kg} \) is projected with initial speed P of \( 20 \mathrm{~m} / \m...

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A particle of \( m=2 \mathrm{~kg} \) is projected with initial speed
P of \( 20 \mathrm{~m} / \mathrm{s} \) at an angle of \( 45^{\circ} \) with the horizontal.

W. The torque of the weight of the particle about the point of projection when the particle is at the highest point is \( -n \hat{k} \). Assume the plane of motion of the particle to be \( x-y \) plane and point of projection as origin. The value of \( n \) is (Take \( g=10 \mathrm{~m} / \mathrm{s}^{2} \) ).
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