{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

190_Problem CHAPTER 9 - PROBLEM 9.142 The piece of roof...

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

View Full Document Right Arrow Icon
PROBLEM 9.142 The piece of roof flashing shown is formed from sheet copper that is 0.032 in. thick. Knowing that the specific weight of copper is 558 lb/ft 3 , determine the mass moment of inertia of the flashing with respect to each of the coordinate axes. SOLUTION Have copper m V ρ = copper tA g γ = Then 1 2 m m = ( ) 3 3 2 2 558 lb/ft 1 ft 0.032 in. 48 6 in 12 in. 32.2 ft/s = × × × × 2 0.092422 lb s /ft = Using Fig. 9-2B for components 1 and 2, have Now ( ) ( ) ( ) ( ) 1 2 1 2 and x x x x x I I I I I = + = Then ( ) 2 2 2 1 6 2 0.092422 lb s /ft ft 1.54037 lb ft s
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}