Courses
Teacher-curated, self-paced courses. Looking for a guided sequence through a full topic? See Learning Paths.
3 courses
Stress, Strain and Hooke's Law
Physics · High School (11–12) · Elasticity and Mechanical Properties of Solids
FreeCh 8 · 1/3
Why is a steel wire stretched only a little by a load that makes a rubber band much longer? In this course we define stress and strain, we find the law of Hooke, we read the stress-strain curve of a metal and see what happens when it yields and breaks, and we use Young's modulus to find how much a wire stretches.
3Lessons12Problems2Python Labs1Question Set1Mock Test
Shear Modulus, Bulk Modulus and Poisson's Ratio
Physics · High School (11–12) · Elasticity and Mechanical Properties of Solids, Pressure and Fluids
FreeCh 8 · 2/3
A solid can be stretched, but it can also be sheared and squeezed, and a stretched wire also gets thinner. In this course we find the shear modulus and the bulk modulus, we see why a liquid has no shear modulus, we find how much water is compressed in the deep sea, and we use Poisson's ratio to connect the three moduli.
3Lessons12Problems2Python Labs1Question Set1Mock Test
Elastic Energy and Applications
Physics · High School (11–12) · Elasticity and Mechanical Properties of Solids, Work, Energy and Power
FreeCh 8 · 3/3
A stretched wire stores energy, like a spring. A rope, a beam and a mountain all have a limit. In this course we find the elastic energy of a wire, we study wires in series and in parallel and the stress of a heated rod, and we use the safety factor to choose the rope of a crane, the shape of a beam and the greatest height of a mountain.
3Lessons12Problems3Python Labs1Question Set1Mock Test