The uniform thin circular disk has a mass of 10 kg, and the coefficient of kinetic friction between the disk and the ground is μk=0.1. Neglect the mass of the bar AB. A counterclockwise moment of 8 Nm is applied to the disk, causing it to spin about the pin at B. Determine:
a) the force in bar AB
b) the angular acceleration of the disk
A
M = 8 Nm
30°
1.2 m
0.4 m
B