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Homework Statement
I need help on this homework problem I can't 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?
Homework Equations
This is the eq i used: delta T =(Vf-Vi)/a
I set Ti as 0.
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?