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August 2, 2015

Homework Help: physics

Posted by seanso on Sunday, January 22, 2012 at 11:25pm.

A truck on a straight road starts from rest and accelerates at 2.0 m/s2 until it reaches a speed of 20 m/s. Then the truck travels for 20 s at constant speed until the brakes are applied, stopping the truck in a uniform manner in an additional 5.0 s.
(a) How long is the truck in motion?
s

(b) What is the average velocity of the truck during the motion described?
m/s

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