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## Homework Statement

http://img337.imageshack.us/img337/3014/classicalmechs.jpg [Broken]

I'm fine until showing that those 4 things are constants.

## Homework Equations

dxj/dt=dh/dpj and dpj/dt=-dh/dxj

## The Attempt at a Solution

I can't show they are constant, for example, can someone show me where I'm going wrong here for p1-0.5bx2:

d(p1-0.5Bx2)/dt=d(p1-0.5Bx2)/dxj*dh/dpj+d(p1-0.5Bx2)/dpj*(-dh/dxj)

=-0.5B*dh/dp2+(-dh/dx1)

=-0.5B(2p2-2eA2)+(eBp2+0.5e^2Bx1)

I think I'm fine on the last part as long as I can assume the constants.

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