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Old Sep 9th 2015, 04:14 PM   #1
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Velocity and Magnitude

My question is this: An object initially at rest experiences an acceleration of 2.0 *m/s≤ for 6.7 s then travels at that constant velocity for another 8.0 s. What is the magnitude of the objectís average velocity over the 14.7 s interval?

This question confuses me, am I supposed to first calculate the distance traveled while its accelerating, then calculate the distance while its at a constant velocity? I tried to find the average velocity and figure it out that way, but the answer I put was wrong. Any tips/pointers in the right direction would be appreciated. Thanks for the help
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Old Sep 9th 2015, 04:23 PM   #2
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Average velocity = total distance divided by total time.

You know the total time so you need to calculate the total distance by separately calculating the distances for all the different parts of the journey and adding them up.
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Old Sep 24th 2015, 02:37 AM   #3
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Your approach seems to be correct. What was your answer and what was the given answer as the correct one?
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