Applied Mechanics - Engineering

Q1:

For maximum range of a projectile, the angle of projection should be

A 30°

B 45°

C 60°

D none of these.

ANS:B - 45°

R= (u^2 sin 2a)/g when a =45° then sin (2 x 45)=sin 90° and sin 90 is 1
So R is maximum when angle is 45°.