Figure is an overhead view of a rigid rod that turns about a vertical axle until the

Question:

Figure is an overhead view of a rigid rod that turns about a vertical axle until the identical rubber stoppers A and B arc forced against rigid walls at distances rA = 7.0 cm and rB = 4.0 cm from the axle. Initially the stoppers touch the walls without being compressed. Then force 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.