# Exam coming soon, need help with this question

• milan.007
In summary, the two bodies are moving in a straight line with a constant velocity of 40m/s and an acceleration of 2m/s2. The question asks how long it takes for the second body, which starts at rest, to catch up with the first body and how far from the starting point this occurs. To solve this, we can use the equations v=u+at, s=ut+0.5at^2, and v^2=u^2+2as. We can also draw a rough graph to visualize the situation. The 10 seconds mentioned in the problem is the time difference between when the first body starts moving and when the second body starts accelerating.
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?

## The Attempt at a Solution

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

and come back with specific doubts.

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.

Draw a picture!

milan.007 said:
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.

## 1. What can I do to prepare for my exam?

To prepare for your exam, start by reviewing all of your notes and materials from the class. Make sure to focus on the key concepts and topics that will likely be covered on the exam. It may also be helpful to create study guides or flashcards to help with memorization. Additionally, try to get a good night's sleep and eat a healthy breakfast on the day of your exam.

## 2. How should I manage my time during the exam?

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## 3. What should I do if I don't know the answer to a question?

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## 5. What should I do after the exam?

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