# One-dimensional collisons

## Homework Statement

An object of mass 2.5kg is moving in the negative x direction at a velocity of 1.0
m/s. It experiences a force shown of 4N for 3 seconds, what is the final velocity after the object has experienced the impulse.

## The Attempt at a Solution

2.5(v-(-1)=12N
And after that I am not quite sure if that is correct or how to fully solve.

It's correct so far. Now recall from maths that $a-(-b) = a+b$, so $12=2.5\times(v+1)$ and hopefully you should be able to solve for $v$ from there :)