1. The problem statement, all variables and given/known data In the figure mA = mB = 1kg . Block A is neutral while qB = -1C, sizes of A and B are negligible. B is released from rest at a distance 1.8m from A . Initially springs is neither compressed nor elongated. https://brilliant.org/discussions/thread/amplitude-of-oscillation/ View the figure above. Equilibrium position of the combined mass is at x = ....... m Note: Collision between A and B is perfectly inelastic. 2. Relevant equations 3. The attempt at a solution a= 10m/s (of block B using qE/m) v = root(2as) = 6m/s mv = 2mv' v' = 3m/s (combined velocity of the system) 1/2 mv^2 = 1/2 kx^2 - qEx 9 = 9x^2 - 10x x = -0.588 The answer is -5/9, which is quite close to my answer but not exactly. Can someone just tell me if what I've done is right?