# Homework Help: Acceleration of a particle

1. Jan 30, 2010

### profcocoon

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

A particle moves from a rest position and accelerates as shown in the graph, which is the distance that the particle has advanced during the first 20 seconds?

2. Relevant equations

3. The attempt at a solution

The answer in the book is 262m but I have no idea of how that solution was obtained, could you guys help me??

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• ###### grafica de fisica.xls
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2. Jan 30, 2010

### PhanthomJay

Profcocoon, welcome to PF!

From your graph, the acceleration appears to be 2 m/s^2 for the first 10 seconds; then there is no acceleration for the next 5 seconds; and then it accelerates at -3 m/s^2 in the final 5 seconds.

Please list what you think are the relevant equations, and show some attempt at a solution using the relevant kinematic equations over the different time periods. You must show some attempt before we can be of further assistance.