Lesson: Stress, Strain, and Elastic Modulus
In this lesson, we will learn how to calculate the change in the length and the volume of a material given properties such as its Young's modulus and bulk modulus.
Sample Question Videos
Worksheet: 25 Questions • 2 Videos
A 20.0-m-tall hollow aluminum flagpole is equivalent in strength to a solid cylinder 4.00 cm in diameter. A strong wind bends the pole equivalently to a horizontal 900.0-N force acting on the the top of the pole. How far to the side does the top of the pole flex? Use a value of Pa for the shear modulus of aluminum.
A steel suspension rod of a suspension bridge is 23 m long. The suspension rod must not stretch by more than 1.1 cm when a truck with a mass of kg passes over the section of the bridge suspended from the rod. What diameter must the rod have if it supports the entire weight of such a truck? Use a value of Pa for the Young’s modulus of steel.
A physicist with a mass of 78.0 kg places himself and kg of equipment at the top of a 640 m high TV broadcast antenna to perform experiments on gravity. If the antenna is modeled as a steel cylinder of radius 0.1700 m, by how much is it compressed due to the weight of the physicist and his equipment? Use a value of Pa for the Young’s modulus of steel.