A particle of mass ‘m’ is projected with a velocity ‘v’ making an angle of 30∘ with the horizontal. The magnitude of angular momentum of the projectile about the point of projection when the particle is at its maximum height ‘h’ is
A
=√32mv2g
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B
Zero
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C
mv3√2g
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D
=√316mv3g
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Solution
The correct option is D=√316mv3g Angular momentum of the projectile = m v r =m.(vcosθ).h=m(vcosθ)v2sin2θ2g=mv3sin2θcosθ2g=√316mv3g