|MadSci Network: Physics|
I am a middle school math teacher who is currently giving the SAT's to my students. After the science portion of the exam, I had a student come up to me and ask me about one particular question (notice I wrote AFTER the test for all of those undercover SAT special agents out there..). I would like to explain the question and the correct response with my students. The question showed a graph of a car starting at 0 mph, gaining speed to 60 mph and hold steady at 60 mph for 2 minutes and then slow down to a complete stop. Naturally, the car was in a state of non-acceleration when it was at a constant speed of 60 mph, but I wanted to be able to explain to my students why that was the correct response. I remember in a college physics class that acceleration was basically a change in velocity, whether you are speeding up or slowing down. Am I remembering right?
Re: the acceleration mystery
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