Chapter 12, Problem 51P

GO Figure 12-62 is an overhead view of a rigid rod that turns about a vertical axle until the identical rubber stoppers A and B are forced against rigid walls at distances r_A = 7.0 cm and r_B = 4.0 cm from the axle. Initially the stoppers touch the walls without being compressed, Then force $\stackrel{\to }{F}$ of magnitude 220 N is applied perpendicular to the rod at a distance R = 5.0 cm from the axle. Find the magnitude of the force compressing (a) stopper A and (b) stopper B.

Figure 12-62 Problem 51.