Physics 1028 Study Guide - Final Guide: Angular Frequency, Net Force, Buoyancy
Document Summary
This is an application of hooke"s law: in which the force in the stress term f/a is given by the weight of the person. We are asked to calculate the absolute change in length, l, which is part of the strain term l/l, in which l is the initial length of the bone. Using the given value for young"s modulus y, we find: (1) (2) The weight of the standard man is w = 690 n. it will create a pressure of 5. 0 108 pa when applied to a cross sectional area of a = w/p = 1. 4 10 6 m . Since the wire has a circular cross section the radius of the wire will be derived from a = r . Therefore the minimum diameter of the wire that supports a standard man and still not exceed the given pressure is dmin = 1. 3 mm.
