Objects accelerate at 9.8 m/s2 [down] when falling?
(a) How long does it take an object dropped from rest (from the top of a tall building) to reach a velocity of 15 m/s [down]? (b) How far does the object fall during that time?
- alexLv 75 months ago
v = u + gt , object dropped from rest --->u = 0 , g = gravity = 9.8m/s^2
height h = (1/2)gt^2