ProblemA block of mass m is placed on a rough surface inclined relative to the horizontal. The incline angle is increased until the block start to move. Show thatyou can obtain the coefficient of static friction ug by measuring the critical angle 0 where slipping occurs.mg pinoto....my18. SolutionJust before slipping, we say that the block is still at rest, so the net force on the x-axis is:EFx=mg sintheta-f sEvaluating, we get:= mg sinthetaBut the frictional force is expressed as the product of coefficient and the normal force so.Hs N= mgFor an inclined plane. The normal force isn=mgThen,Ps=mg sinthetacos(e)so:Ps= 1tan(e)

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Just before slipping, we say that the block is still at rest, so the net force on the x-axis is: EFx=mg sintheta -f s Evaluating, we get: mg sintheta But the frictional force is expressed as the product of coefficient and the normal force so. Hs N = mg For an inclined plane. The normal force is n=mg Then, Ps=mg sintheta cos(e) so: Ps- 1 tan(e)

Just before slipping, we say that the block is still at rest, so the net force on the x-axis is: EFx=mg sintheta -f s Evaluating, we get: mg sintheta But the frictional force is expressed as the product of coefficient and the normal force so. Hs N = mg For an inclined plane. The normal force is n=mg Then, Ps=mg sintheta cos(e) so: Ps- 1 tan(e)