1. The problem statement, all variables and given/known data I'm total newbie when it comes to differenciatiation, and was wondering if I'm doing this correct. Basically, this is a physics problem, but thought I'd put this in the calculus section for specific help. It's about a ball undergoing SHM, after being dropped down a shaft on an asteroid! (an everyday occurance you'll find) I've got to find the constants for A, B, and C. We haven't been told what they represent, but I'm pretty sure B is velocity, C, acceleration due to gravity (Not Earths gravity, remember) and I think A is either Amplitude, or initial position. I'm not sure. 2. Relevant equations x(t) = A + Bt + Ct^2 Where the ball is released at x=R at t=0s 3. The attempt at a solution Not sure i'm doing this correctly, but for the first derrivative... R(0s) = A + B x 0s + C 0s^2 = A. So does this mean, that time at 0s is in position A?