MECHANICS Problem No. 50

Module # MECH_P_050_Raymond_Serway_John_Jewett Statement A truck on a straight road starts from rest, accelerating at m/s2 until it reaches a speed of 20.0 m/s. Then the truck travels for 20.0 s at constant speed until the brakes are applied, stopping the truck in a uniform manner in an additional s. (a) How long is the truck in motion? (b) What is the average velocity of the truck for the motion described?