A particle of mass m = 1 kg is projected on a horizontal surface with speed u = 20 2 m s - 1 at an angle 45 o with horizontal. Find the torque of the weight of the particle about the point of projection when the particle is the highest point. Take g = 10 m s - 2

Question

A particle of mass m = 1 kg is projected on a horizontal surface with speed u = 20 2 m s - 1 at an angle 45 o with horizontal. Find the torque of the weight of the particle about the point of projection when the particle is the highest point. Take g = 10 m s - 2, 400 N – m, 200 N – m, 150 N – m, 450 N – m

MARKS App · Accepted Answer

τ = m g R 2 = m g u 2 sin ⁡ 2 θ 2 g = m u 2 2 ( a s θ = 45 o ) = 1 20 2 2 2 = 400 N m

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