Oil is mainly used to reduce friction between contacting surface, e.g., metal on metal - not to reduce air friction.
Oil is used to reduce friction.
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True
Yes, Oil forms a coating on the cylinder walls to reduce friction and is also used as a coolant to protect engine parts
How does the flow of air reduce friction of the hovercraft in motion?
Friction is the act of one surface rubbing against another. To reduce friction, use something that offers a small amount of friction. Smoother substances reduce friction. A way to reduce friction is to use something which offers a small amount of friction. For example, you could use something like plastic or glass. Water, most liquids and different types of oil reduce friction. Powder, oil and grease are used in between surfaces to also reduce friction.
You can reduce friction by using lubrication, like grease for bearing, sewing machine oil etc.
you can use some anti-friction like lubricants (oil,gas).
By lubricating it or adding oil to the surface.
OIL == ==
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There are a few ways to reduce friction. For example one can apply water or oil to the surfaces that are rubbing together.