MEX-004 · Introduction to mechanics Sample material

Physical quantities and the system of units (SI)

A physical quantity, its numerical value and unit; the International System of Units (SI): base and derived units, decimal prefixes, dimensional analysis and measurement errors.

Estimated time: 2 h 50 min 4 activities

Learning objective

Master the concepts of physical quantity, unit and measurement.
Know the seven SI base units and the main derived units.
Learn to convert units using decimal prefixes and scientific notation.
Learn dimensional analysis and the estimation of measurement errors.

Expected outcomes

Can express the unit of any mechanical quantity in terms of SI base units.
Checks formulas for dimensional consistency and finds simple relations by dimensional analysis.
Correctly converts km/h, g/cm³, mm, µm and other units to SI.
Calculates the mean value and relative error in direct and indirect measurements.

Interactive modelScales of the Universe

Activities

Lecture
Lecture · 1 h 15 min · required
Problem solving: “Physical quantities and the system of units (SI)”
Practice · 1 h 15 min · required
Determining the density of solid bodies of various shapes
Laboratory · 2 h 30 min · optional
Final test
Test · 20 min · required · pass ≥ 70%

Completion conditions

  • Lecture
  • Problem solving: “Physical quantities and the system of units (SI)”
  • Final test — at least 70%