Across
- 3. A bearing in which the parts are separated by a ring of small freely rotating metal balls which reduce friction.
- 5. Force which is also called the Coulomb force or Coulomb interaction, is defined as the attraction or repulsion of different particles and materials based on their electrical charges.
- 6. The resistance that one surface or object encounters when moving over another.
Down
- 1. attraction or repulsion that arises between electrically charged particles because of their motion. It is the basic force responsible for such effects as the action of electric motors and the attraction of magnets for iron.
- 2. Friction is the force resisting the relative motion of solid surfaces, fluid layers, and material elements sliding against each other.
- 4. The force that attracts a body towards the centre of the earth, or towards any other physical body having mass.