Definition:Dimension (Measurement)/Units
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Definition
Compare with units of measurement.
This concept of dimension is more abstract than that of units, which are standard quantities of the particular dimension in question.
Examples
- Displacement has dimension $\mathsf L$.
- Velocity has dimension $\mathsf {L T}^{-1}$ (change in displacement, that is length traveled, per unit of time).
- Acceleration has dimension $\mathsf {L T}^{-2}$ (change in velocity per unit of time).
- Force has dimension $\mathsf {M L T}^{-2}$ (mass times acceleration, from Newton's Second Law of Motion).