A force of $400 \mathrm{~N}$ is applied to the brake drum of $0.5 \mathrm{~m}$ diameter in a band-brake system as shown in the figure, where the wrapping angle is $180^{\circ} .$ If the coefficient of friction between the drum and the band is $0.25,$ the braking torque applied, in $N \cdot m$ is

(A) 100.6

(B) 54.4

(C) 22.1

(D) 15.7

A force of $400 \mathrm{~N}$ is applied to the brake drum of $0.5 \mathrm{~m}$ diameter in a band-brake system as shown in the figure, where the wrapping angle is $180^{\circ} .$ If the coefficient of friction between the drum and the band is $0.25,$ the braking torque applied, in $N \cdot m$ is

(A) 100.6

(B) 54.4

(C) 22.1

(D) 15.7

1 Answer - 5876 Votes