Acceleration vector of an object (answer check)

[negation]

Homework Statement

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.

The Attempt at a Solution

 

[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

 

[negation]

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

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!

 

[tiny-tim]

Mathematica uses φ as j-hat.

ahh!

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

EDIT: eg $\hat{j}$

 

[negation]

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