MEX-019 · Friction, elasticity and deformation Sample material

Hooke's law and deformations

Types of deformation, elastic and plastic (inelastic) deformations, Hooke's law, mechanical stress and strain, Young's modulus, combinations of springs and the energy of elastic deformation.

Estimated time: 2 h 50 min 4 activities

Learning objective

Know the types of deformation and the difference between elastic and plastic deformation.
State Hooke's law for a spring ($F = kx$) and a rod ($\sigma = E\varepsilon$).
Master the concepts of stiffness, Young's modulus, stress and strain.
Learn to calculate the total stiffness of springs connected in series and in parallel.

Expected outcomes

Calculates the stiffness of a spring, its extension and its elastic energy.
Finds the extension of a wire or rod using Young's modulus.
Classifies bodies as elastic or inelastic and gives examples.

Interactive modelHooke's law: stretching a spring

Activities

Lecture
Lecture · 1 h 15 min · required
Problem solving: elastic forces
Practice · 1 h 15 min · required
Elastic forces. Hooke's law
Self-study · 6 h 15 min · optional
Final test
Test · 20 min · required · pass ≥ 70%

Completion conditions

  • Lecture
  • Problem solving: elastic forces
  • Final test — at least 70%