_:n94afa5ce22584136b60d74ac5113d1aaxb22
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"Frictional force : opposes the relative motion between the contact surfaces of the objects.\r\nIt is major necessity in our daily life such as writing on a paper(friction is present between the surface of pencil and paper through which it make possible to write) , friction facilitate us to walk , holding a glass of water,etc., These are all possible acts due to friction present. \r\n\r\nFriction can be acts as evil if we consider the amount of loss of energy in any process such as , the wear-and-tear of the tires of vehicles on the road during motion is due to friction, pushing of the heavy objects on the rough surface makes it difficult to move due to friction present. \r\n\r\n★ So, overall we can say that friction  is the necessary evil in the human life."
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