A projectile of mass m is fired from ground with speed u at an angle θ to horizontal. What is the power of gravitational force, when it makes an angle θ 2 with the horizontal?

Question

A projectile of mass m is fired from ground with speed u at an angle θ to horizontal. What is the power of gravitational force, when it makes an angle θ 2 with the horizontal?, - m g u cos θ tan θ 2, - m g u tan θ cos θ 2, - 2 m g u tan θ sin θ 2, - 2 m g u sin θ tan θ 2

MARKS App · Accepted Answer

v x = u cos ⁡ θ = v cos ⁡ θ 2 , where v is the speed at this instant v y = v sin θ 2 = u cos θ sin θ 2 cos θ 2 = u cos θ tan θ 2 P = F → . v → = - m g u cos θ tan θ 2

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