An aircraft lands on a runway and brakes with a constant acceleration of -1.50 m/s 2 . Its initial velocity when it touches ground is 42.0 m/s.
a) How far does the plane go on the runway before coming to a halt?
b) How much time does it take to come to a halt, from the moment of touchdown?
c) What is the displacement at t = 6.25 seconds after touchdown?