1. The problem statement, all variables and given/known data A spring, of negligible mass and which obeys Hooke's Law, supports a mass M on an incline which has negligible friction. The figure below shows the system with mass M in its equilibrium position. The spring is attached to a fixed support at P. The spring in its relaxed state is also illustrated. Pic link: http://i995.photobucket.com/albums/af79/huybinhs/plot-2.png a) Mass M has a value of 245 g. Calculate k, the spring constant. b) The mass oscillates when given a small displacement from its equilibrium position along the incline. Calculate the oscillation frequency. 2. The attempt at a solution I know that I need to find the component of the acceleration due to gravity along the inclined plane. From the graph I can find the sinθ. Then find the force which pulls the spring down. Find the extension of the spring and then k. But I dont know how to get started (no ideas how to get numbers on the graph). Please be a guider! Thanks!