Define angle of friction and angle of repose. Show that angle of friction is equal to angle of repose for a rough inclined plane. A block of mass 'g=10" "m//s^(2)' is resting on a rough horizontal plane and is about to move when a horizontal force of '30" "N' is applied on it. If '4" "kg' , find the total contact force exerted by the plane on the block.
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30×10×2/4 so answer will come out
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