A differential band brake similar to the one shown in Figure 18.17 is being considered for use with a hoist drum. With the hoist operating at rated load, a brake torque of 4000 N·m is required to hold the drum from slipping. The brake is to be designed to slip at a 15 percent overload. Available space limits the cast-iron brake drum diameter to 650 mm, with brake band contact extending over an angle of 250°. Design values for the brake lining selected are f = 0.40, Pmax = 1.1 MPa. (a) Determine forces P₁ and P2 corresponding to maximum brake torque and select an appropriate value of brake band width. (b) If distance a (Figure 18.17) is 120 mm, what value of distances would enable the brake to be operated with a force F of 200 N at the end of a lever of length c = 650 mm? (c) Using the linkage dimensions from part b, what value of coefficient of friction would make the brake self-locking? Partial Ans. b 47.97 mm s = 13.4 mm f ≥ 0.5024

Find Ix for the shape below:

Draw a circular hole of 2cm deep and give dimensions to it.

Fill in all blanks before submission. Round the answer to the nearest integer The figure shows a rod of length 6 ft and weight 100 lb hinged to the ground at point A. The rod rests on a stone in the shape of a sphere of radius 3ft. The center of the sphere O is located at a distance of 5 ft from point A. The normal reaction N between the sphere and the rod is lb. The horizontal component of the reaction at A is lb while the vertical component of the reaction at A is lb. 6 ft The magnitude of the reaction at A is lb. The angle of the reaction at A is 3 ft 0 5 ft

Exercises: find the solutions of: y² + y = - 6x Ô ý - y = 2x (2sinx ty cosx) 8 ⑨-'=x lo y" + y² - 4 y²- 4y = 32 ³² - 4x-6. -3x

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resolve, results not similar to given solutions

solve using analytical way Given a single disk system that rotates as in picture. If: m₁ = 10 kg; R₁ = 15 cm; θ1=30°, m₂ = 15 kg; R₂ = 20 cm; θ₂ = 100°, m3 = 10 kg; R3 = 10 cm; θ3= 160° and Re= 12,5 cm, calculated "me" and "θe"

Question 1.1 a-c please explain solving method

this is 100% correct, but please tell me how to solve this carefully.