# Homework Help: Exam coming soon, need help with this question!

1. Feb 29, 2008

### milan.007

Exam coming soon, need urgent help with this question!

1. The problem statement, all variables and given/known data
A body leaves a point A and moves in a straight line with a constant velocity of 40m/s. Ten seconds later another body which is at rest at A is given an accelleration of 2m/s2 and moves in the same direction as the first body. How long does it take the second body to catch up with the first? How far from A does this occur?

2. Relevant equations

3. The attempt at a solution

2. Feb 29, 2008

Use these:
v=u+at
$$s=ut+0.5at^2$$
$$v^2=u^2+2as$$

and come back with specific doubts.

3. Mar 1, 2008

### milan.007

I know im suppsed to use those equations but i dont know how? I dont know what to do with the 10 seconds.

4. Mar 1, 2008

### tiny-tim

Draw a picture!

Sometimes a picture makes things clearer.

Draw it for yourself (only roughly) on a graph (distance against time).

Then I think you'll see where the 10 seconds comes in.