I try to model a simple one mass point pendulum in 3D, the mass point is located on the y - axis, at a distance d. Rotations around the y-axis do not make physical sense, hence, I use only qx, qz to describe the angles of rotation of the frame of m.
If MM is the mass matrix, I get determinant(M) = 0. As this pendulum is so simple, I do not think I made a mistake modeling it. What could be the problem? Thanks for any help! -- You received this message because you are subscribed to the Google Groups "sympy" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/sympy/44eb551f-453a-47a6-ba23-335b32fd15e9n%40googlegroups.com.
