A block of weight 200N is pulled along a rough horizontal surface at constant speed by a force 100N acting at an angle 300 above the horizontal. The coefficient of kinetic friction between the block and the surface is:
A
0.43
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B
0.58
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C
0.75
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D
0.83
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Solution
The correct option is D 0.58 For vertical equilibrium, N=200−100sin300=150N For horizontal equilibrium, f=100cos300 f=μN