An airplane accelerates down a runway at 4 m/s2 for 30s until is finally lifts off the ground. Determine the distance traveled before takeoff.
S = ut + ½ a t2
as u = 0, the equation becomes S = ½ a t2
a = 4 m/s2
t = 30 secs
So the distance travelled = ½ . 4. 302 = 1800 m