Physical Quantities and Units

Vocabulary flashcards covering the fundamental concepts of units and physical quantities as described in the lecture notes.

Unit

A standard with which things are compared, which must be chosen before a measurement can be made.

Physical quantities

All the quantities that can be measured, such as length, mass, time, density, and temperature.

Base quantities

The minimum number of physical quantities selected and standardized such that all other physical quantities can be expressed in terms of them.

Base units

The corresponding units for base quantities.

Derived quantities

Physical quantities defined in terms of base quantities.

Derived units

The corresponding units for derived quantities.

Force

A physical quantity defined in the transcript as $\text{Mass (m)} \times \frac{\text{change in velocity}}{\text{time (t)}}$.