Mechanical Properties of Solids — Class 11 Maharashtra HSC Physics revision notes
A 6-page visual revision sheet for Mechanical Properties of Solids, written for Class 11 Maharashtra HSC Physics. Formulas, diagrams and the traps that cost marks, laid out to be read the night before rather than the term before. Free, and it opens inside CapCompass.
Page 1 as PDF
Mechanical Properties of Solids in one look
stress, strain, three moduli, and the friction that keeps two surfaces from sliding at all
Stress and strain
- stress is the internal restoring force per unit area, N/m^2 or Pa
- strain: change in a dimension over the original, no units
- elastic: regains its shape and size once the force is removed
- plastic: it does not regain its shape
- no solid is perfectly elastic or perfectly plastic
- quartz fibre is closest to ideal elastic, putty to ideal plastic
Three kinds of stress and strain
| Type | Stress | Strain |
|---|---|---|
| Tensile or compressive | F/A along the length | Δ L / L |
| Shearing | F/A along the face | Δ l / l = tanθ ≈ θ |
| Volume | pressure change Δ P | Δ V / V |
Shear and volume
- shear: a force along the top face, the foot held, the angle θ
- volume: pressure on every face alike, the size shrinks
Hooke's law
- within the elastic limit, stress/strain is a constant
- that constant is the modulus of elasticity
- it is the slope of the straight part of the stress strain graph
- it depends on the material, never on size or shape
- a wire's stretch is in step with its load
Page 1 of 6. The full sheet, all 6 pages, opens free in the app.
What this Mechanical Properties of Solids sheet covers
- Stress and strain
- Three kinds of stress and strain
- Shear and volume
- Hooke's law
- The stress strain curve
- Brittle, ductile, elastomer
- Brittle
- Ductile
- Elastomer
- Elastic hysteresis
- Young's modulus
- definition
- for a wire of radius r, load Mg
- Reading Searle's apparatus
- Bulk modulus, modulus of rigidity, Poisson's ratio
- bulk modulus, pressure change dP
- compressibility, the reciprocal of K
- modulus of rigidity, shear stress over shear strain
- Poisson's ratio
- Bulk modulus: solid, liquid, gas
- Moduli in the limits
- Strain energy
- energy stored in a stretched wire
- strain energy per unit volume
- in terms of Y and strain alone
- Uses of elasticity
- Ropes and mountains
- Hardness, strength, toughness
- Hardness
- Strength
- Toughness
- Friction, what it is and why
- Static and kinetic friction
- limiting static friction
- kinetic friction
- Static, kinetic, rolling
- Static
- Kinetic
- Rolling
- Living with friction
- Symbols
- Traps that cost marks
- Tricks that save time
How CapCompass uses this sheet
These notes are not a standalone PDF. CapCompass plans Physics chapter by chapter against your real exam dates and free hours, and when the plan reaches Mechanical Properties of Solids the sheet opens inside the study block itself — at the page covering the sub-topic that block is on, with the timer still running. Revision arrives at the moment the plan says revise, instead of having to be gone looking for.