On an inclined plane, the forces acting on an object of mass can be resolved along the incline (+ up) as follows:
Gravity force+Friction force
=-mgsin(θ)+Ff
The above sum equals zero if the object stays in equilibrium.
Therefore
Ff=mg sin(&theta)
The above can be derived by drawing a free-body diagram, with which you should be familiar.
A brick of mass 2kg just begins to slide down an inclined plane at an angle of 45 degree with horizontal.what will be the force of friction
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