QUIZ NOTES
Created Wednesday 25 May 2016
Dimension: Classification/Nature of physical quantity
Unit: Standard of measurement of a physical quantity
Dimensions
distance -> L
time -> T
mass -> M
Dimensional homogeneity means only quantities with the same dimensions may be compared, equated, added, or subtracted.
Basically only stuff with same dimensions can be used mathematically.
| Quantity | SI Unit | Other SI Unit | Dimension |
|---|---|---|---|
| Force | kgms^-2 | N | MLT^-2 |
| Energy | kgm^2s^-2 | J | ML^2T^-2 |
| Power | kgm^2s^-3 | W | ML^2T^-3 |
| Momentum | kgms^-1 | MLT^-1 | |
| Impulse | kgms^-1 | MLT^-1 |