Chapter 8: Mechanical Properties of Solids
NCERT Class 11 Physics, Part II, Chapter 8. 5 lessons, 13 narrated 3D videos, 6 simulations and 10 quiz questions, following the textbook section by section.
- Stress and strainIn the chapter on rotation we treated bodies as perfectly rigid: no force could change their shape. Real bodies are not like that. Every solid can be stretched, squeezed…
- Hooke’s law and the stress-strain curveHang a long steel wire from a strong beam and add weights to it, one at a time. Each weight stretches the wire a little more.
- Young’s modulusIn the straight-line part of the stress-strain graph, the ratio of stress to strain is constant. For a wire or rod that is stretched or compressed, this ratio is called…
- Shear modulus and bulk modulusClamp the bottom of a metal block and push its top face sideways with a force F. The top slides by Δx, and the block leans over by a small angle θ.
- Applications of elastic behaviourElastic behaviour matters in everyday engineering. Watch a crane at a building site lift a load of 10 tonnes, that is 10⁴ kilograms, with a steel rope.