1. The problem statement, all variables and given/known data Question 1 on the following page: http://www.maths.tcd.ie/~frolovs/Mechanics/PS10.pdf It's the second part I'm stuck on ('Explain why the equations of motion do not...') 2. Relevant equations 3. The attempt at a solution I first found equations for x_1 'dot' and x_2 'dot' (using p = dL/dx'dot') and rearranged to get L(x_i,p_i) Then H(p,x) = p_1.x_1'dot' + p_2.x_2'dot' - L(x_i,p_i) and Hamilton's equations of motion: p_i 'dot' = -dH/dx_i q_i 'dot' = dH/dp_i I don't know how to solve the second part though. Is it dependent on my answers or is it something about equations of motion in general? Thanks for any help!