friction can be increased by making the surface on an object
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Friction can be increased by increasing the roughness of the surfaces in contact. ... A substance that is introduced between two surfaces in contact, to reduce friction, is called a lubricant. Fluid friction can be minimized by giving suitable shapes to the objects moving in the fluids.
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Friction can be increased by increasing the roughness of the surfaces in contact. For example, treading of shoes and tires is done to increase friction. When friction is undesirable we have to reduce the friction. ... A substance that is introduced between two surfaces in contact, to reduce friction, is called a lubricant.
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