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**1. Homework Statement**

A fish swimming in a horizontal plane has a velocity

**V**i=(4i +1j) m/s at a point in the ocean where the position relative to a certain rock is

**r**i = (10i -4j)m. After the fish swims with constant acceleration for 20.0s, its velocity is

**v**=(20i -5j) m/s.

a.) What are the components of the acceleration?

B.) What is the direction of the acceleration with respect to unit vector i? C.) If the fish maintains constant acceleration, where is it at t= 25s, and in what direction is it moving?

**2. Homework Equations**

The fact of the matter is we have constant acceleration, which means that the average acceleration is equal to the instantaneous acceleration. Also we know the equation for Aavg= Ainst= Delta V/Delta T = Vf-Vi/Tf-Ti OR we can use the kinematics equation: Vf=Vi+at, therefore Vf-Vi/T = a. So I did that , got the right answer I hope.

*The part that bugs me is B, what do they mean by the direcion of the acceleration with respect to unit vector i. Unit vector i is just the x component, so it'll always be either east or west. The answer is some angle measurement? Do I find the resultant? I tried for the last hour with every variation, trying to find resultant vectors, to just adding/subtracting the individual x component vectors. Can someone outline what I'm supposed to do here?*

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