Q.

A body of mass 10 kg is lying on a rough inclined plane of inclination 37∘ and μ=12, the minimum force required to pull the body up the plane is

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a

80 N

b

100 N

c

120 N

d

60 N

answer is B.

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Detailed Solution

Fmin=mgsin⁡θ+μkcos⁡θ=10×9.835+12×45=98N If g=10ms−2Fmin=100N.
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A body of mass 10 kg is lying on a rough inclined plane of inclination 37∘ and μ=12, the minimum force required to pull the body up the plane is