Across
- 3. that occurs when an object rolls over a surface.
- 4. device in which an object to be weighed is attached to the end of a helical spring.
- 5. that attracts everything towards itself.
- 6. the attraction or repulsion that arises between electrically charged paticles because of their motion.
Down
- 1. a bearing in which the parts are separated by a ring of small freely rotating metal balls which reduce friction.
- 2. the attraction or repulsion of different particles and materials based on their electrical charges.