An automobile and a truck start from rest at the same instant, with the automobi

Question

An automobile and a truck start from rest at the same instant, with the automobile initially at some distance behind the truck. The truck has a constant acceleration of 2.80 m/s2, and the automobile an acceleration of 3.40 m/s2. The automobile overtakes the truck after the truck has moved 57.0 m.

(a) How much time does it take the automobile to overtake the truck?
  s

(b) How far was the automobile behind the truck initially?
  m

(c) What is the speed of each when they are abreast?
automobile:
  m/s

truckL:

m/s

Explanation / Answer

My answer

a) How much time does it take the automobile to overtake the truck?
67 s

(b) How far was the automobile behind the truck initially?
76m

(c) What is the speed of each when they are abreast?
automobile:
96m/s

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