An elevator car whose floor to ceiling distance is equal to 2.7 m starts ascending with constant acceleration 1.2 m/s2. 2 s after the start, a bolt begins falling from the ceiling of the car. Find
(Take g=9.8 m/s2 )
(a) the time after which bolt hits the floor of the elevator.
(b) the net displacement and distance travelled by the bolt, with respect to earth.