[Potironette]

What about when you swing a thing then stop and let it swing on its own? The centripetal force keeps decreasing this way though.

Also, what's a "polynomial?" I have a review sheet asking me to identify if random expressions are polynomials or not, their degrees, and the "type" of polynomial they are, but I have no idea what a polynomial actually is. Why isn't cosine or sine something a polynomial? What does it mean that the "type" of polynomial is "based on the number of terms?"