Nice to meet you all. While this may be my first post here, I will be here quite often for the next year because I'll be taking physics.(adsbygoogle = window.adsbygoogle || []).push({});

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

John drives 15 km directly west from Orion to Chester at a speed of 86 km/h, then directly south for 7.0 km to Seiling at a speed of 85 km/h, then finally 33 km southeast to Oakwood at a speed of 91 km/h. Assume he travels at constant velocity during each of the three segments.

(a) What was the change in velocity during this trip? [Hint: Do not assume he starts from rest and stops at the end.]

>magnitude in km/h

>direction in ° south of east

(b) What was the average acceleration during this trip?

>magnitude in km/h2

>direction in ° south of east

2. Relevant equations

average acceleration = deltaV/deltaT

3. The attempt at a solution

(a) I've tried finding the X & Y components of each section, and using the distance formula to determine the displacement(?), and dividing that by the time taken on the trip (which I found by dividing the length of each vector by the speed and mashing it together), but it turned out to be incorrect...

So then I tried to average the deltaV's of the first two & last two velocities, whcih wasn;t right either...

All of the book examples & teacher's example only had two different velocities, while this one has three, so I am at a total loss as to what I should do...

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# Homework Help: Vectors (?), Change in Velocity, Average Accel.

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