고체역학 (Gere) — Axially Loaded Members: Problem 2.2-11

2.2-11 A small lab scale has a rigid L-shaped frame ABC consisting of a horizontal arm AB (length \(b = 250\text{ mm}\)) and a vertical arm BC (length \(c = 175\text{ mm}\)) pivoted at point B. The pivot is attached to the outer frame BCD that stands on a laboratory bench. The position of the pointer at C is controlled by a spring, \(k = 875\text{ N/m}\), that is attached to a threaded rod. The pitch of the threads is \(p = 1.6\text{ mm}\). Under application of load W, 12 revolutions of the nut are required to bring the pointer back to the mark. Calculate the weight W.