A ferrari race car on a straight road starts from rest,accelerating at 2.00 m/s^2 until it reaches a speed of 20.Then the car travels for 20.

A ferrari race car on a straight road starts from rest,accelerating at 2.00 m/s^2 until it reaches a speed of 20.0m/s.Then the car travels for 20.0 s at constant speed until the brakes are applied,stopping the truck in a uniform manner in an additional 5.00 s.(a)How long is the truck in motion? (b)What is the average velocity of the truck for the motion described?