Mechanics → Appendix: Units, Constants, and Reference Data → SI System of Units
SI System of Units
The International System of Units (SI) is the standard system used in physics.
Fundamental Units
| Quantity |
Unit |
Symbol |
| Length |
meter |
m |
| Mass |
kilogram |
kg |
| Time |
second |
s |
| Electric current |
ampere |
A |
| Temperature |
kelvin |
K |
| Amount of substance |
mole |
mol |
| Luminous intensity |
candela |
cd |
Derived Units
| Quantity |
Unit |
Symbol |
| Velocity |
m/s |
m/s |
| Acceleration |
m/s² |
m/s² |
| Force |
newton |
N |
| Energy |
joule |
J |
| Power |
watt |
W |
| Pressure |
pascal |
Pa |