Want this question answered?
It's to reduce friction (and thus heat) generated while the machine's parts are moving.
You would put a lubricant - oil or grease - between the moving parts.
== == It is a substance, as oil or grease, that reduces friction when applied as a surface coating to moving or working parts of a mechanism.
The grease is there to lessen friction between two metal parts. Without grease the moving parts would heat up due to the friction.
a "lubricant" is a friction-reducing substance: a substance, typically oil or grease, applied to a surface to reduce friction between moving parts
A simple machine doesn't have any moving parts.
They don't have moving parts.
They are called simple machines.
Oil and grease is used to eliminate friction between moving parts.
Lubrication is the use of oil and grease to increase friction in a vehicle's moving parts
yes it does
to reduce friction