Lesson: Stress, Strain, and Elastic ModulusPhysics
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
The bulk modulus of a material is N/m2. What is the percent change in volume of a piece of this material when it is subjected to a bulk stress increase of N/m2? Assume that the force is applied uniformly over the surface.
A nylon rope has a Young’s Modulus of Pa, a length of 35.0 m when not stretched, and a diameter of 0.800 cm. If a mountain climber of mass 65.0 kg hangs on this rope, how much does it extend?
Two rods, one made of brass and the other of lead, have the same dimensions. When a particular stress is applied to the brass rod, it stretches by 0.18 mm. How much does the lead rod stretch under the same stress? Use a value of Pa for the Young’s modulus of brass and use a value of Pa for the Young’s modulus of lead.