Answer in one word/a few words. A material that is used to lubricate machine parts
Answer in one word/a few words. The act of movement
Answer in one word/a few words. A type of force that is exerted by the surface when an object moves across it
Answer in one word/a few words. Produced by lamp because of friction
Answer in one word/a few words. Material that is used to reduce friction on a carom board
