Question

A foul ball is hit straight up into the air with a speed of 25 m/s.

how long is it in the air?

Answer 1

31.25 m

Step-by-step explanation:

The foul ball experiences upward linear motion thus:

initial velocity(u) - 25m/s

final velocity(v) - 0m/s

velocity due to gravity - -10m/s2 (since the ball moves upwards)

Hence:

v2=u2+2(gs)

0=625+2(-10*s)

0=625-20s

-625=-20s

s=31.25m