When a body slides or rolls over another body or on a surface, then a force opposing the motion acts between those surfaces of the body which are in contact, this force is called force of friction.
Types of Friction
a.) Static Friction: The force of friction that comes into play between two surfaces in contact before the actual motion starts, is called static friction.
b.) Limiting Friction: The maximum force of friction which comes into play before a body just begins to slide over the surface of another body, is called limiting friction.
c.) Kinetic Friction: When a body moves over another body, then the force of friction acting between two surfaces in contact with relative motion is called kinetic friction.
d.) Rolling Friction: When one body rolls over another body, then the frictional force acting between two is called rolling friction.
Types of Friction
a.) Static Friction: The force of friction that comes into play between two surfaces in contact before the actual motion starts, is called static friction.
b.) Limiting Friction: The maximum force of friction which comes into play before a body just begins to slide over the surface of another body, is called limiting friction.
c.) Kinetic Friction: When a body moves over another body, then the force of friction acting between two surfaces in contact with relative motion is called kinetic friction.
d.) Rolling Friction: When one body rolls over another body, then the frictional force acting between two is called rolling friction.
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