For maximum range of a projectile, the angle of projection should be-A-30°B-45°C-60°D-none of these.-B-45°

Question

For maximum range of a projectile, the angle of projection should be-A-30&#176;B-45&#176;C-60&#176;D-none of these.-B-45&#176;

APTITUDE CRACK · Accepted Answer

B 45&#176; R= (u^2 sin 2a)/g when a =45&deg; then sin (2 x 45)=sin 90&deg; and sin 90 is 1 So R is maximum when angle is 45&deg;.

Applied Mechanics