| Quantity | Formula | Unit |
|---|---|---|
| Angular velocity | omega = 2pi/T = 2pi*f | rad/s |
| Linear speed | v = r*omega | m/s |
| Centripetal acceleration | a_c = v^2/r = romega^2 = vomega | m/s^2 |
| Centripetal force | F_c = mv^2/r = mr*omega^2 | N |
| Time period | T = 2*pi/omega | s |
| Frequency | f = 1/T | Hz |
Direction: velocity is tangential, acceleration is radial (toward centre), and these are always perpendicular in UCM.