Tell differences between static,sliding,rolling friction.
Answers
It is the friction that exists between a stationary object and the surface on which it's resting.
Eg:-A lady pushing a box.
Sliding friction
It is the resistance created by two objects sliding against each other.
Eg:-rubbing hands together to create heat.
Rolling friction:-
It is the force resisting the motion when a body rolls on a surface.
Eg:-Ball rolling down ...
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Static Friction
Static friction acts on objects when they are resting on a surface. For example, if you are hiking in the woods, there is static friction between your shoes and the trail each time you put down your foot . Without this static friction, your feet would slip out from under you, making it difficult to walk. In fact, that's exactly what happens if you try to walk on ice. That's because ice is very slippery and offers very little friction.
Rolling Friction
Rolling friction is friction that acts on objects when they are rolling over a surface. Rolling friction is much weaker than sliding friction or static friction. This explains why most forms of ground transportation use wheels, including bicycles, cars, 4-wheelers, roller skates, scooters, and skateboards. Ball bearings are another use of rolling friction.They let parts of a wheel or other machine roll rather than slide over on another.