A rocket is fired upward with an initial speed of 1960 meters per second. After how many minutes does it hit the ground?

Question

Initial speed is 1960 meters per second

Answer 1

If t= time in seconds, then 1960t=gt²/2 where g=9.81 m/s/s the acceleration of gravity.

So t=0 (initial condition) or 3920/9.81=399.6 seconds=6.66 mins approx or 6⅔ mins (6m 40s).