Elasticity-problem - modulus for its material be 12.5x10 11...

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

View Full Document Right Arrow Icon
Problems: Elasticity 1. A 500 kg mass in hung from a 3 m steel wire with a cross-sectional area of 0.15 cm 2 . How much does the wire stretch? Y = 2.0x 10 11 N/m 2 2. A wire 1.5 m long has a cross-sectional area of 2.4 mm 2 . It is hung vertically and stretches 0.32 mm when a 10-kg block is attached to it. Find (a) the stress, (b) the strain, and (c) Young’s modulus for the wire. 3. A structural steel rod has a radius R of 9.5 mm and a length L of 81 cm. A force F of 6.2 X 10 4 N stretches it along length. (a) What is the stress in the rod? (b) What is the elongation of the rod under this load? What is the strain? 4. A solid copper cube has an edge length of 85.5 cm. How much pressure must be applied to the cube to reduce the edge length to 85.0 cm? The bulk modulus of copper is 1.4x10 11 N/m 2 . 5. A metal wire of length 3 m and diameter 1mm is stretched by weight of 10 kg. If Young’s
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: modulus for its material be 12.5x10 11 dynes/cm 2 and for it equal to 0.26, calculate the lateral compression produced. 6. (a) A wire, 4 m long and 0.3 mm in diameter, is stretched by a force of 800 gm wt. If the extension in length amounts to 1.5 mm, calculate the energy stored in the wire. (b) Find the work done in Joules in stretching a wire of cross-section 1 mm 2 and length 2m through 0.1 mm if Youngs modulus for the material of the wire is 2x10 12 dynes/cm 2 . 7. The youngs modulus of a metal is 2X10 11 N/m 2 and its breaking stress is 1.078 X 10 9 N/ m 2 . Calculate the maximum amount of energy per unit volume which can be stored in the metal when stretched. 8. Calculate the work done in stretching a uniform metal wire of area of cross section 10-6 m 2 and length 1.5 m through 4x 10-3 m. Given, Y= 2X10 11 N/m 2 ....
View Full Document

This note was uploaded on 04/16/2011 for the course EEE 30 taught by Professor Dr.sohrabuddin during the Spring '11 term at American Intl. University.

Ask a homework question - tutors are online