We've looked at several analogies between straight-line motion and rotational motion, including:
| Variable | Straight-line motion | Rotational motion | Connection |
|---|---|---|---|
| Displacement | x | q | q = x/r |
| Velocity | v | w | w = v/r |
| Acceleration | a | a | a = a/r |
| Produces motion | F | t | t = r ´ F |
| Inertia | m | I | I = ò r2 dm |
| Second Law | SF = ma | St = I a | |
| Work | W = F · d | ?? | |
| Kinetic Energy | K = ½ mv2 | ?? |