please explain

Asked by  | 3rd Oct, 2008, 12:33: AM

Expert Answer:

Dear student,

The normal reaction by the surface is always perpendicular to the surface.

By newton's third law the surface gives a reaction.The reaction has two components,one perpendicular to surface known as normal reaction and other is parallel to surface i.e. friction.

So weight is balanced by net reaction which is a vector sum of normal reaction and friction.

Answered by  | 8th Oct, 2008, 03:39: PM

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