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A block of 800N is acted by a horizontal force P as shown in fig. If the coefficient of friction between the block and inclined are

μs=0.35 and μk=0.25 determine the value of P for imending motion up the plane.

enter image description here

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enter image description here

fy=0

Nmg=0N=mg

By Newton’s 2nd law,

F=maμ N=ma0.4×m×9.81=m×aan=3.924m/s2an=V2ρV=an.ρ=3.924×0.5=1.4m/s

Angular velocity,

W=Vr=140.5=2.8rad/sW=2.8rad/sec

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