Physics
posted by Megan .
A ball is thrown vertically upwards with an initial velocity of 27.0 m/s. Neglecting air resistance, how long is the ball in the air?

Twice as long as it takes to go up.
v = Vi  9.8 t
0 = 27  9.8 t
t = 2.755 to go up
so twice that is 5.51 seconds