2.
Angular Displacement
The official unit of angular displacement is in radians, but it can be expressed in several different ways.
- A wheel turns through 5 radians. This is pretty straightforward:
- A wheel spins through 90°. To convert from degrees to radians, you can multiply by :
- A wheel spins around 5 times. "Times" is usually a synonym for "revolutions". To convert from revolutions to radians, multiply by :
Remember that a counterclockwise rotation means , and a clockwise rotation means .