Astraight sided cam has both sides tangential to the base of the circle which is 25mm radius and the total angle of action is 120 degrees. a lift of 10mm diameter is given to a roller 20mm diameter, the centre of which moves along a straight line passing through the axis of the cam. the camshaft has a speed of 240rev/min. determine the following: the radius of the nose arc; the speed of the roller centre when the roller is in contact with the cam at the end of one of the straight flanks adjacent to the nose ; the greatest acceleration of the roller center;