Questions and Answers
Which type of physical quantity consists of a magnitude and unit?
What is an example of a fundamental unit?
Which system of units uses foot, pound, and second as the base units for length, mass, and time respectively?
What type of unit is the Newton (N)?
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What sets the SI system apart from earlier systems like CGS and FPS?
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Study Notes
Physical Quantities and Units
- A scalar physical quantity has only magnitude, whereas a vector physical quantity has both magnitude and direction.
- A physical quantity that consists of a magnitude and unit is called a measurable quantity.
Units
- A fundamental unit is a unit that cannot be expressed in simpler units, for example, meter (m) for length.
- The system of units that uses foot, pound, and second as the base units for length, mass, and time respectively is the Foot-Pound-Second (FPS) system.
Derived Units
- The Newton (N) is a derived unit, as it is derived from fundamental units, specifically, N = kg·m/s².
SI System
- What sets the SI (International System of Units) apart from earlier systems like CGS (Centi-Gram-Second) and FPS is that SI is a decimal-based system, making conversions easier and more logical.
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Description
Test your understanding of physical quantities and their classification into base and derived quantities. This quiz covers the fundamental concepts of measuring and expressing physical properties.
