Engineering, 15.04.2020 04:13 priceisright11401

A single-start square-thread power screw has an input power of 3 hp at a speed of 2 rev/s. The screw has a major diameter of 2-in and a four threads per inch. The friction coefficients are 0.14 for the threads and 0.09 for the collar, with a mean collar diameter of 3-in.
(a) Find the maximum load that the screw can lift. (Express your answer to the nearest lb).
(b) Also calculate the efficiency of the screw.

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A single-start square-thread power screw has an input power of 3 hp at a speed of 2 rev/s. The screw...