Across
- 4. Substances used to reduce friction
- 5. The SI unit of force
- 6. To- and -fro motion
- 7. Special shape given to objects to reduce friction.
Down
- 1. A non- contact force
- 2. A stringed musical instrument
- 3. Force acting on a unit area
- 5. Unpleasant sounds
- 8. The human voice box.
- 9. The frictional force exerted by fluids .