“Ah. You are not solving the equations of motion, child. You are betraying them. Tell me—are you using the Euler method?”
[ F(x) \approx -kx \quad \Rightarrow \quad m\ddotx + kx = 0 ] symon mechanics solutions
Rigid body dynamics
But remember: the ultimate goal is not to possess the solutions. It is to internalize the mechanics so thoroughly that you no longer need them. When you can close the Symon textbook, pick up a blank sheet of paper, and derive the precession rate of a gyroscope from Euler’s equations entirely on your own—then you have succeeded. And at that moment, you will realize that the best "Symon mechanics solution" was the one you built in your own mind, step by patient step. step by patient step.