Question

A rocket falls from the apogee (0 meters per second) until it hits the ground with a speed of 10 meters per second. Gravity pulled it down with an acceleration of 9.8m/s^2. The time during which the ball is in free fall is approximately what time?

Answer 1

Answer:

Approximately 1.02 seconds

Explanation:

Use the final velocity (vf) formula for a uniformly accelerated movement under "g" (acceleration of gravity):

$v_f=v_i+g\,*\,t$

in our case:

$10=0+9.8\,*\,t\\t=10/9.8\\t\approx 1.02\,\,sec$