# Simple Motion in 2 Dimensions, Have Velocity Compnents, Trying to find Displacement

1. Oct 3, 2009

### PeterFer

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

Two forces, vector F 1 = (3 i - 2 j) N and vector F 2 = (4 i - 7 j) N, act on a particle of mass 1.70 kg that is initially at rest at coordinates (-1.70 m, +4.25 m).

i know that the components of the velocity at 9.4 seconds are (38.7i - 49.7647j)m/s
i also know that the direction the particle is moving at 9.4 seconds is 307.87 degrees
2. Relevant equations

3. The attempt at a solution
some how everything I do brings me to (363.78i - 467.788j)m which is wrong

2. Oct 3, 2009

### tiny-tim

Welcome to PF!

Hi PeterFer! Welcome to PF!

You don't need, and shouldn't use, the final velocity …

(it's misled you into using s = vt)

just use one of the standard constant acceleration equations

(and don't forget to add on the initial position).

3. Oct 5, 2009

### PeterFer

Re: Simple Motion in 2 Dimensions, Have Velocity Compnents, Trying to find Displaceme

ah yea thank you, i ended up realizing that myself but thank you anyway