The diameter of the roller is 20 mm and the diameter of the cam shaft is 25 mm. The displacement of the valve, while being raised and lowered, is to

take place with simple harmonic motion. a) Draw the profile of the cam when, the line of stroke of the valve rod passes through the axis of the cam shaft, and b) Determine the maximum acceleration of the valve rod when the cam shaft rotate sat 100 r.p.m. c) Draw the displacement, the velocity and the acceleration diagrams for one complete revolution of the cam.