Question

friction can be produced by using
a. oil
b. grease
c. powder
d. all of these​

Answer 1

Answer:

powder can reduce the friction

Answer 2

Answer:

When surfaces in contact move relative to each other, the friction between the two surfaces converts kinetic energy into thermal energy (that is, it converts work to heat). This property can have dramatic consequences, as illustrated by the use of friction created by rubbing pieces of wood together to start a fire.

FRICTION CAN BE REDUCED BY POWDER BECAUSE GREASE AND OIL ARE SLIPPERY .