Ball sliding down smooth curve 1. The problem statement, all variables and given/known data A mass of 2 kg is dropped vertically into a frictionless slide located in the x-y plane. The mass enters with zero velocity at (-5,5) and exits traveling horizontally at (0,0). Assuming the slide to be perfectly circular in shape construct a model of the forces acting on the mass and hence simulate its motion. 2. Relevant equations Unknown. 3. The attempt at a solution How is it done? This is the question written so it's easier to understand....... Quarter-Circle radius 5 starting at (-5,5), ending at (0,0), centre at (0,5). Ball mass 2.1kg is let go vertically at (-5,5) and left to slide down the slope. The ball can be assumed to be a sliding point mass. So, s_0 = (-5,5) v_0 = (0,0) a_0 = (0,-9.8) v_f = (sqrt(2*9.81*5),0) = (9.90, 0) s_f = (0,0) But, how do you model it?