OK, I have never had physics till this semester and I am in calculus based physics and it is kicking my butt. I don't understand how derivatives are properly used in the formulas, and I have an example, my question is the image attached. @=theta A=alpha SO, A) I need omega (angular velocity). w= d@/dt right? so if @=0.11(4.9)^2, plugged into that equation... we end up with: w=d(0.11*4.9^2)/d(4.9) w=0.11(2)(4.9)/1=1.08 rad/s, <------this is right I think. B) got it: v=rw, no sweat, v=10.8m/s C) Here is where I trip up. According to my understanding, A=dw/dt, which means d(1.08)/d(4.9).... but thats not right, derivatives of constants=0....I don't understand. It's been a while since I took calculus, so am I just messing something dumb up???