Exam coming soon, need help with this question

[milan.007]

Exam coming soon, need urgent help with this question!

Homework Statement

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?

Homework Equations

The Attempt at a Solution

 

[Google_Spider]

Use these:
v=u+at
[tex]s=ut+0.5at^2[/tex]
[tex]v^2=u^2+2as[/tex]

and come back with specific doubts.

 

[milan.007]

I know I am suppsed to use those equations but i don't know how? I don't know what to do with the 10 seconds.

 

[tiny-tim]

Draw a picture!

I don't know what to do with the 10 seconds.

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.