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1. ### Teaching change in velocity

I would also agree that the magnitude of the velocity, or the speed, is increasing in the negative direction.
2. ### Teaching change in velocity

Yes, I am just talking about 1-Dimensional motion.
3. ### Teaching change in velocity

I agree. So look at this graph. I read this to say that the velocity is decreasing from 4.0 s to 14.0 s. Quite frankly, I don't see any other way to interpret it unless you start incorporating speed into the discussion, but that isn't necessary because all of the information about the...
4. ### Teaching change in velocity

Thanks for the reply. I would also say an object accelerates when it is slowing down or the magnitude of the velocity is decreasing, not just speeding up and increasing, respectively. Its just a negative acceleration. Im not sure i got your response about how you would regard this change, do...
5. ### Teaching change in velocity

Thanks for the reply .Scott. So are you saying that either would be fine? To me, if I say that the velocity is "increasing," then by definition, I am saying that he acceleration is positive. In this case the acceleration is negative.
6. ### Teaching change in velocity

Good afternoon all, For those of you that teach physics, if an object has an initial velocity of - 5m/s and a final velocity of -20 m/s, do you consider the velocity to be increasing or decreasing in this case? I view this to be strictly defined mathematically, that is that the acceleration is...