Question

At the highest point of a projectile its velocity i half the initial velocity in magnitude The angle of projection from ground is

• A. ${30}^o$
• B. ${45}^o$
• C. ${60}^o$
• D. ${90}^o$

Answer 1

Answer: (C)

${60}^o$

$\begin{array}{c}4\cos \varnothing ={\frac{1}{2}}^4\\ \cos =\frac{1}{2}\\ \varnothing ={60}^0\end{array}$