Differentiate between rolling and static friction
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1. Rolling Friction:
– Rolling friction occurs when one object rolls over another surface.
– It is typically associated with round objects, such as wheels or balls, making contact with a surface.
– Rolling friction is generally lower than static friction and kinetic friction, making it easier for objects to move smoothly across a surface.
– The frictional force arises due to the deformation of the objects in contact and the resistance generated by surface irregularities.
2. Static Friction:
– Static friction occurs when there is no relative motion between two surfaces in contact.
– It prevents an object from moving when an external force is applied but is not sufficient to overcome the force keeping the object stationary.
– The magnitude of static friction depends on the force applied to the object and the frictional characteristics of the surfaces in contact.
– Static friction is higher than rolling friction and kinetic friction because it must counteract the force applied to initiate motion.