problem11_92

University Physics with Modern Physics with Mastering Physics (11th Edition)

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
11.92: a) Taking torques about the pivot, the tension T in the cable is related to the weight by . sin 2 so , 2 sin 0 0 θ mg T mgl l θ T = = The horizontal component of the force that the cable exerts on the rod, and hence the horizontal component of the force that the pivot exerts on the rod, is θ mg cot 2 and the stress is . cot 2 θ A mg b) . 2 cot 0 0 AY θ mgl AY F l l = = c) In terms of the density and length, , ) ( 0 l ρ A m = so the stress is
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: g l cot ) 2 ( and the change in length is . cot ) 2 ( 2 g l d) Using the numerical values, the stress is 5 10 4 . 1 Pa and the change in length is m. 10 2 . 2 6- e) The stress is proportional to the length and the change in length is proportional to the square of the length, and so the quantities change by factors of 2 and 4....
View Full Document

This document was uploaded on 02/05/2008.

Ask a homework question - tutors are online