Question

what is the cause of friction?how can we minimse it?

Answer 1

Answer:

Friction can be increased by increasing the roughness of the surfaces in contact. ... When friction is undesirable we have to reduce the friction. Friction can be minimized by using lubricants like oil and grease and by using ball bearing between machine parts.

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Answer 2

Answer:

Cause - Irregularities b/w surfaces and contact.

Minimizing - lubrication i. e. using lubricants like grease oil, etc., polishing surfaces, smoothening surfaces, streamlining objects.....