Recent content by bumpkin

derivative can also be described as rate of change. Rate of change is zero at any point in the original function where there is a minimum or a maximum. In this case, you are trying to maximise the energy transfer, or the point where the ratio of the kinetic energy of the two particles is a...

rho and h are constant. I hadn't even thought of b. But for a, I would assume the acceleration at the edge of the disc would be different to the gravity long the axis of the disc? Ie if the disc was in the xy plane, the gravity at (r,0,h) would be different to (0,0,sqrt(r^2+h^2))?

what signs on the velocity terms? http://en.wikipedia.org/wiki/Acceleration#Average_and_instantaneous_acceleration

Homework Statement calculate the gravity acceleration at an arbitrary location due to a disc of thickness h, radius r and density p Homework Equations g=Gm/r^2 The Attempt at a Solution define r in terms of the vector magnitude from the measurement point to some point on the...