Elasticity in Physics - Stress & Strain [Young’s / Bulk / Shear Modulus]

In this video we cover elasticity in physics, including tensile stress, tensile strain, compressive stress, compressive strain, Young’s modulus, bulk modulus, and shear modulus of materials. We also cover examples of how to calculate these properties of materials and how they are used to solve problems.

0:00 - Elasticity, Stress, and Strain

3:50 - Young’s Modulus

6:32 - Spring Model and Volume Stress/Strain

9:26 - Bulk Modulus

11:58 - Shear Modulus

16:14 - Elastic and Plastic Behavior and Fracture Points

19:28 - Summary of Types of Stresses and Strains

21:28 - A wire is that is 110 cm long is stretched to 112.2 cm by an attached weight of 250 N. If the wire has a cross section with a radius of 0.24 mm, find Young’s modulus for the wire.

24:05 - A rope is elongated by 0.9 m after being pulled by the weight of a 50 kg mass. The rope is 52.0 m long and has a radius of 0.4 cm. Find Young’s modulus for the material fo the rope.

25:26 - Find the minimum radius of coppor wire needed if it it to be 2.5 m long and stretch no more than 0.35 cm when pulled by a 420 N force.

27:35 - How fast can a 1500 kg elevator accelerate if the steel cable has a 3.50 cm² cross-sectional area and cannot exceed an elastic limit of 9.0 x 10⁷ Pa.

30:27 - Determine the magnitude of shear force needed to deform a brass cube with a length of 1 cm by an angle of 0.07°.