Question

A ball is thrown

horizontally with an initial velocity of

30m/s from a height of 2 m. How long will it take to reach the ground? How far will it go?

Answer 1

The time of motion

$$t=\sqrt{\frac{2H}{g}}=\sqrt{\frac{2*2}{9.8}}=0.64\:\rm s$$

The horizontal distance

$$d=v_0t=30*0.64=19\:\rm m$$