Question

A baseball is thrown horizontally with an initial velocity of 20 m/s from

the height of 1.5 m. How long will it take to reach the ground? How far

will it go horizontally?

Answer 1

Time in air

$$t=\sqrt{2h/g}=\sqrt{2*1.5/9.8}=0.55\:\rm s$$

The horizontal distance

$$l=v_0t=20*0.55=11\:\rm m$$