# Acceleration vector of an object (answer check)

1. Jan 16, 2014

### negation

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

The position of an object as a function of time is r→ = (3.2t + 1.8t^2)i + (1.7t - 2.4t^2)j
Find its acceleration vector.

3. The attempt at a solution

2. Jan 16, 2014

### tiny-tim

hi negation!

(please type your answer directly into the post in future)

if that's i and j (why did you write φ ? ), then that looks ok

3. Jan 16, 2014

### negation

Hi time,

I'm not acquainted with the use of Latex, although, I'm trying to pick up the use of Latex through member's post by looking at their codes.

Mathematica uses φ as j-hat.

Thanks for checking!

4. Jan 16, 2014

### tiny-tim

ahh!

(and for latex on this forum, just type two #s before and after )

EDIT: eg $\hat{j}$

Last edited: Jan 16, 2014
5. Jan 16, 2014

### negation

edit:

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