Question

A particle (from mass m) is projected from ground with speed u at angle$\theta$(>$45^0$) with horizontal.Consider motion of the particle between point of projection and the position where the velocity of the particle becomes perpendicular to projection velocity.Average power delivered gravitational force during the motion considered is,

• A. $\frac{mugsin\theta }{2}[1-{cot}^2\theta ]$
• B. $\frac{mg{u}^2}{2g}[1-{cos}^2\theta ]$
• C. $\frac{mugsi{n}^2\theta }{2}[1+{cot}^2\theta ]$
• D. $\frac{mugcos\theta }{2}[1+{sin}^2\theta ]$

Answer 1

The correct option is A $\frac{mugsin\theta }{2}[1-{cot}^2\theta ]$

Hence, option $\left(A\right)$ is correct answer.