Science, asked by Aditya9507, 1 year ago

What is a friction and its types

Answers

Answered by Anonymous
1
hey dear friend!!!!!!
friction: it is a force. Friction is the resistance to motion of one object moving relative to another. It is not a fundamental force, like gravity or electromagnetism. Instead, scientists believe it is the result of the electromagnetic attraction between charged particles in two touching surfaces.
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Answered by Anonymous
0
Hi

Here is your answer,

Friction may be defined as the opposing force which comes into play tangentially between two surfaces to destroy the relative motion between them.

→Friction is the contact force along common tangent to the contacting surfaces to destroy the relative motion between them.

→Friction non-conservative force.


FRICTION IS OF 2 TYPES:-


Static Friction:- The resistance encountered buy a body in static condition while tending to move under the action of an external force is called 'static fiction' [ DEFINITION ]

→Static friction is equal and opposite to the applied force parallel to the contacting surfaces.

→Now, if we consider a body at rest on a rough horizontal surface. When an infinitesimally small force is applied on the body the body remains at rest. This is because of the frictional force of magnitude equal to the external force acting on the body in the opposite direction.

→When the applied force is increased frictional force also increases equally until the body starts moving. When it is about to slide on the table , the static friction reaches a maximum value and it is equal and opposite to the applied force. Any further increase in the applied force makes the body slide on the table.

↔The maximum value of static friction is called ''Limiting friction''. ( Fl)


KINETIC FRICTION OR DYNAMIC FRICTION:- 

→(The resistance encountered by a sliding body on a surface is known as  kinetic friction or dynamic friction). [DEFINITION]

→Now, if we consider a body sliding on a surface. It encounters a resistance to the motion due to the motion due to which the body eventually comes to rest.

→The body moves with acceleration due to the resultant force on it. If the body slides with uniform velocity (a=0) the resultant force on the body should be equal to keep the body moving with uniform under friction, is numerically equal to the value of kinetic friction.


Hope it helps you !


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