What is frictionSolutionThe force that resist relative motion .pdf

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What is friction Solution The force that resist relative motion of solid surfaces ,layers of fluid and material elements that slides against each other is called friction .there are many times of friction: dry friction-it resists the relative motion between solid surfaces that appears in contact with each other.it is ssubdivided into two types: static friction that is between surfaces that are non moving and kinectic friction that is between moving surfaces Fluid friction-it describes friction between viscous fluid layers that makes movement relative to each other lubricated friction-the seperstion between solid surfaces is made by a fluid lubricant. skin friction-the force that resists fluid motion across body surface. rolling friction-it resists the relative motion of a rollong object.it is a combination of various frictional force types at wheel\'s point of contact and the surface..

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