Question

H8-4: For the following diagram, bar AB is pinned to collar B which is unthreaded and rests on collar C. The mean radius of the thread is 1.5 in and the pitch is p 0.2 in. Between the threads of collar C and the threads of the vertical shaft, Au-0.22 and μ,-0.25. The suspended object is 300 lb. What couple must be applied to the collar C to rotate it at a constant rate, and to cause the object to move upward? 20 in 十一-20 in--. IA

Answer 1

Dats trom the ajven que fin supen ded object 30o1 300 tan tan () 4 036 fi d

a. la n 3 11 Kightenin 2 2. 3,00 χ 3 tan (1S, 2S, 2 tan (S 25) uSox o 272 touple required to tove (oruPod is 122.672. 16.in