Mechanical Properties of Solids — Formula Sheet
Maharashtra Board · Class 11 · Physics
7 formulas from Mechanical Properties of Solids (Maharashtra Board Class 11 Physics) on one page, grouped by topic. Includes For a wire under load.
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Formulas and Key Relations
Hooke's Law and Elastic Modulus
Elastic modulus = stress/strain (slope of stress-strain curve)
Key relations
Stress is the internal restoring force per unit area (σ = F/A) measured in Pa.
Within elastic limit, stress is directly proportional to strain: Stress ∝ Strain, or Stress/Strain = constant (elastic modulus).
Y = (F/A)/(ΔL/L) = FL/AΔL, measures resistance to longitudinal deformation.
For a wire under load
Y = MgL/πr²l.
K = -V(dP/dV) = Volume stress/Volume strain, measures resistance to volume change under uniform pressure.
η = (F/A)/θ = Shearing stress/Shearing strain, measures resistance to shape change.
Full sheet with units and worked examples
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Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
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