Required information The block-type hand brake shown in the figure has a face width of 1.25 in and a mean coefficient of friction 0.25, 0ƒ = 0.025. For an estimated actuating force of 90 lbf where the deviation from the mean is due entirely to environmental conditions, find the brake torque corresponding to +30f. Assume the moment of the normal forces MN is 69.405 pa; that the moment of the frictional forces Mfis 3.728 pa, the torque 7 is 348.7 lbf-in, and pa is 27.4 psi, all at the nominal friction coefficient, and that c is 20 in. NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part. 6R -90°- 45° -12- Rotation What are the values for each of the following for -30f The coefficient of friction f is The maximum pressure pa is Torque Tis psi. Ibf-in.
The block-type hand brake shown in the figure has a face width of 1.25 in and a mean coefficient of friction 0.25, σf = 0.025. For an estimated actuating force of 90 lbf where the deviation from the mean is due entirely to environmental conditions, find the brake torque corresponding to ±3σf . Assume the moment of the normal forces MN is 69.405 pa; that the moment of the frictional forces Mf is 3.728 pa, the torque T is 348.7 lbf-in, and pa is 27.4 psi, all at the nominal friction coefficient, and that c is 20 in. NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part. What are the values for each of the following for -3σf The coefficient of friction f is . The maximum pressure pa is psi. Torque T is lbf·in.
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