Question

The compact clay pigeon throwing mechanism shown in the figure uses spring CD to throw a clay disk at A. The disk is initially connected to slender rod ABC at point A and is released once the rod rotates 90 deg as shown. Rod ABC has a mass of 0.1slug. Disk A has a mass of 0.025slug and should be treated as a thin circular disk with a radius of 2in in this problem. If the free length of the spring is 1in, find the linear spring rate required to launch the clay pigeon at 90ft/s. Assume ABC starts from a rest. Gravity is perpendicular to the page (i.e. it has no effect on this problem).

4in 3in 5in 3in

Answer 1