The brake shown in figure has a coefficient of friction 0.25 and is to operate using a maximum force F of 500 N. Assume width of the band to be 50 mm, find the braking torque.

The brake shown in figure has a coefficient of friction 0.25 and is to operate using a maximum force F of 500 N. Assume width of the band to be 50 mm, find the braking torque. Correct Answer 357.8 N

ΣMo=0 = 115P2 – 365F =0 P2 = 1586.96N α = 33.59° Φ = 270 – 33.59 = 4.126 radians P1 = 4449.6N Braking torque = (P1 – P2)D/2 = 357.8 N.
Bissoy MCQ

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