course Phy 201
I have questions about Week 4 Quiz#2 Version 1.
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• What are its possible initial velocities, and what is a possible scenario for each?
• What is the maximum distance the object travels up the ramp? ""
My Questions:
Does magnitude mean that the actual acceleration could be positive or negative?
Exactly, and that's an important key. Coasting up the incline acceleration would be in the direction opposite to the displacement.
If so, is this what would cause different possible initial velocities, or is there another factor?
You would get different initial velocities depending on whether you noticed that acceleration and displacement were in opposite directions; only the latter would give you a correct answer.
Do you use the equation `ds = vo `dt + .5 a `dt^2 to find the initial velocity?
That is one alternative, and it's the one I would choose.
What equation do you use to find the maximum distance the object travels up the ramp?
You use the equations of motion, or direct reasoning.
Once you know the initial velocity, which you appear to be well on the way to finding, you set up a second interval, this time with final velocity 0. Max displacement occurs when the object comes to rest. Acceleration is the same as before.
I have spent over an hour trying to figure this problem out and have no idea how.
You're asking exactly the right questions and I'd say it was a profitable hour. I think you'll get the rest easily, but if not let me know.