The force of 400N is applied to the brake drum of 0.5m diameter in a band – brake system as
shown in the figure, where the wrapping angle is 180 0 . If the coefficient of friction between the
drum and the band is 0.25, the braking torque applied, in N.m is.
(a) 100.6
(b) 54.4
(c) 22.1
(d) 15.7