Lower end of a uniform inextinsible rope of mass 2 kg and length 4 kg is attached to a block of mass 7.5 kg placed on a horizontal floor.coefficient of friction between block and floor is 0.5 .The upper end of a string is held 2 m upward the lower end so that the tangent at lower end remains horizontal. if block is in equilibrium then find 1. the angle with horizontal by which ripe must pulled? 2. frictional force between block and floor .
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(fs) max = μ × 2 × g = 0.4 × 2 × 10 = 8N F - (fs) max = ma F - 8 = 6 × 1.5 F = 17N
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