Comment on the direction of friction and why it is considered as contact force?
CLASS 8
chapter 11 Force and pressure
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Explanation:
Friction is a force exerted by a surface against the motion of a body across its surface.Friction is a type of contact force only. Applied Force: Force which is applied to an object by another object. A person pushing a barrel is an example of applied force.
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Another example, if a book slides across the surface of a desk, then the desk exerts a friction force in the opposite direction of its motion causing it to stop sliding after a finite distance. Friction is a type of contact force only. Applied Force: Force which is applied to an object by another object.
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