Question 338453
gravitational acceleration is  9.8m/s^2 (meters per second per second)


starting from rest , distance equals one half acceleration times time squared ___ d = .5 a t^2


36 = .5 * 9.8 * t^2 ___ 72/9.8 = t^2 ___ use your calculator to find t


velocity equals acceleration times time ___ v = at = 9.8 * t ___ use the calculated value of t to find the velocity