# A projectile is shot from the ground at a velocity of 12 m/s and at an angle of (pi)/2. How long will it take for the projectile to land?

Here, $u = 12 \frac{m}{s}$ , $\theta = \frac{\pi}{2}$
$t = \frac{2 u \sin \theta}{g}$
$t = \frac{2 \times 12 \times 1}{10}$
$t = 2.4 \sec$