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**This isn't really a homework problem. I'm studdying for the AP Physics C: mechanics test by working on practice free response problems that my teacher gave me. My question pertains to a problem in the 1993 set of questions.**

Let's say, for example, a car moves to the right with a constant force F and there's an opposing force of -kv where v is velocity and k is a constant.

If it's given that v(0) = 0, and I have found an expression for velocity as a function of time in terms of F, k, and m, but I haven't been given values, and I'm suppose to graph v(t)... do I just make up numbers for F,k, and m? I don't think I've ever graphed anything without knowing values. Or am I just suppose to estimate what the curve will look like?

Even if my expression is wrong, they'll probably still give me points for correctly graphing my wrong answer. That's how AP tends to work.

**Also, one other question:**my Physics teacher has pretty much left out the calculus side of everything we've learned this year. Will this hurt me on the test? If so, what calculus should I study?