A gody is projected from the ground at an angle of $\tan ^{-1}\left(\frac{8}{7}\right)$ with the horizontal.…
A gody is projected from the ground at an angle of $\tan ^{-1}\left(\frac{8}{7}\right)$ with the horizontal. The ratio of the maximum height attained by it to its range is
$8: 7$
$4: 7$
$2: 7$
$1: 7$
Solution
For a projectile projected at angle $\theta$;
Maximum height, $H_{\max }=\frac{u^2 \sin ^2 \theta}{2 g}$
and range, $R=\frac{u^2 \sin 2 \theta}{g}$
$\therefore$ Ratio $=\frac{H_{\max }}{R}=\frac{\left(\frac{u^2 \sin ^2 \theta}{2 g}\right)}{\left(\frac{u^2 \sin 2 \theta}{g}\right)}=\frac{\tan \theta}{4}$
Here, $\theta=\tan ^{-1} \frac{8}{7} \Rightarrow \tan \theta=\frac{8}{7}=\frac{\frac{8}{7}}{4}=\frac{2}{7}$