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I've been working my way through my homework this week, and haven't had much trouble until I hit this question...

1. The problem statement, all variables and given/known data

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 2.07 , and the automobile an acceleration of 3.46 . The automobile overtakes the truck after the truck has moved a distance 42.0 .

3. The attempt at a solution

I answered part A of the question correctly, which was as follows:

How much time does it take the automobile to overtake the truck?

t = 6.37

The parts I can't get are:

How far was the automobile behind the truck initially?

X= ? m

What is the speed of the truck when they are abreast?

v= ? m/s

and

What is the speed of the automobile when they are abreast?

v= ? m/s

Mainly, I'm just not sure how to arrive at the correct equation for the problems. If I could get that I could probably figure them out.

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# Homework Help: Starting point in linear motion problem

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