list few instances to show friction is an evil
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Frictional force causes a lot of losses in general upkeep and wear and tear of machinery. Hence it is considered as a evil. But almost all crucial tasks cannot be carried out without the presence of friction. Basic activities like walking and writing on a surface are possible due to friction
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Answer:walking in the floor.
nails are held in the wall.
helps fingers to hold a pen.
vehicles move on the road.
mechanical power transmission of belt-drive.
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