The simple band brake is constructed so that the ends of the friction strap are connected to

Question:

The simple band brake is constructed so that the ends of the friction strap are connected to the pin at A and the lever arm at B. If the wheel is subjected to a torque M, determine the smallest force P applied to the lever that is required to hold the wheel stationary. The coefficient of static friction between the strap and wheel is μs.

Given:

M = 80 lb⋅ ft β = 45 deg

μ s = 0.5 r = 1.25 ft

α = 20 deg a = 1.5 ft

b = 3 ft



M


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