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Units of Measurement

Explore the definitions and relationships of basic quantities in engineering, such as length, time, mass, and force, as defined by Newton's second law. Learn about unit conversions and how different units are related.

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Units of Measurement

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  1. Units of Measurement ENGR 2214 Dr Simin Nasseri MET Department, SPSU

  2. Definitions • Basic Quantities are: • Length (Meter, Foot) • Time (Second) • Mass (Kilogram, Slug) • Force (Newton, Pound force) • Units: • Basic quantities (force, mass, length, time) are related by Newton’s second law. • Units used to measure quantities are not all independent. • Three of four units (mass, length, time), called base units, are arbitrarily defined and the fourth (force) is derived.

  3. Units

  4. Units Unit conversions: Force: 1 lb = 4.4482 N Mass: 1 slug = 14.5938 kg length: 1 ft = 0.3048 m

  5. Conversion factors

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