Projectile fired in earths gravitational field at a height of of 0.90m above ground level, with a horizontal velocity of 9m/s. How far will the ball fly before hitting the ground? How long will the ball stay in the air?

Answer 1

time in air;
hf=hi -4.9timeinair^2
0=.9 -4.9 t^2 solve for timeinair t.

horizontal distance=9*t