Question

To prevent the machines from friction, we should _ _ _ _ them 
paint
cover
lubricate
wash​

Answer 1

Answer:

To prevent the machines from friction, we shout lubricate them.

Explanation:

lubrication helps in minimizing the friction between the two bodies.

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Answer 2

Hey mate..Here is ur ans_

✔️✅Lubricate them.

=>When oil or grease is applied between the moving parts of a machine ,a thin layer of oil or grease is formed between the two rubbing surfaces.

=> This layer of oil separates the two rubbing surfaces a little bit due to which their interlocking is reduced to a large extent.

=>This friction is reduced and movement becomes smooth.When oil or grease is applied to the moving parts of a machine, then their surfaces do not rub directly against each other, they rub through a layer of oil and grease.

=>The substance which reduce friction are called lubricants

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