<Generalized coordinates> are variables $q_1,\ldots,q_n$ that specify the allowed instantaneous configuration of a <mechanical system>. They need not be Cartesian positions: a rigid pendulum's <angle> is a suitable single coordinate. With constraints solved, the particle positions are functions $\mathbf r_i(q_1,\ldots,q_n,t)$.

Solution

Past exam of the physics 1 paper of the University of Oxford / 2014 / 4 / a / Solution

 Solution (source code)