Mechanics → Introduction to Mechanics → Physical Quantities and Units
Physical Quantities and Units
Physics relies on measurable quantities.
Fundamental Quantities
| Quantity | Unit | Symbol |
|---|---|---|
| Length | meter | m |
| Mass | kilogram | kg |
| Time | second | s |
Derived Quantities
Velocity:
$$ v = \frac{\text{distance}}{\text{time}} $$
Acceleration:
$$ a = \frac{\text{change in velocity}}{\text{time}} $$
Force:
$$ F = ma $$