A student standing on the ground throws a ball straight up. The ball leaves the student's hand with a speed of 19.0m/s when the hand is 1.50m above the ground.

Question

How long is the ball in the air before it hits the ground? (The student moves her hand out of the way.)

Answer 1

hf=hi+vi*t-1/2 g t^2

hf=0, hi=1.5 , vi=19

solve for t. It will be a quadratic.