Question

A truck on a straight road starts from rest, accelerating at 2.00 m/s2 until it reaches a speed of 48.0 m/s. Then the truck travels for 48.0 s at a constant speed until the brakes are applied, stopping the truck in a uniform manner in an additional 5.00 s.

Answer 1

motion of truck constitutes of 3 travels.
1. accelerating uniformly with acceleration a1 = 2 m/s^2 until its velocity reached 20 m/s travelling a
distance of 's1' meters.
2. uniform motion with 20 m/s for a time duration t1 = 20s travelling a distance of 's2' meters.
3. uniform deceleration for t2 = 5 sec which stops the truck after travelling a distance of 's3' meters..