(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

I need help on this hw problem I cant seem to figure it out.

A objects constant acceleration is north at 40 m/s^2. At time 0 its velocity vector is 15 m/s west at what time will the magnitude of the velocity be 30 m/s?

2. Relevant equations

This is the eq i used: delta T =(Vf-Vi)/a

I set Ti as 0.

3. The attempt at a solution

So I got 30-15/40= .375 secs

I also tried subtracting gravity from acceleration to give (30-15)/(40-9.8) =.496 secs

These are apparently wrong. what should i be doing?

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

2. Relevant equations

3. The attempt at a solution

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# Homework Help: Constant accleration problem

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