A car starts from rest, attains a velocity of 36 km h -1 with an acceleration of 0.2 m s -2 , travels 9 km with this uniform velocity and then comes to halt with a uniform deceleration of 0.1 m s -2 . The total time of travel of the car is
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Let the car be accelerated from A to B. It move s with uniform velocity form B to C and then moves we uniform decelerations form C to D. For the motions of car from A to B.
Time taken , 
For the motion of car from B to C
S = 9 km = 9000 m
Time taken, 
=900s
For the motions of car from C to D.
Time taken, 
Total time taken 
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