| Answer | Crossword Clue |
|---|---|
| AXIS | Main line of motion. |
| guideway | a track for controlling the line of motion of something |
| guideways | GUIDEWAY, a track for controlling the line of motion of something |
| node | point, line, or surface of a vibrating body or system that is free or relatively free from vibratory motion |
| inertiae | a property of matter by which it remains at rest or in uniform motion in the same straight line unless acted upon by some external force |
| inertia | a property of matter by which it remains at rest or in uniform motion in the same straight line unless acted upon by some external force |
