A block of mass 100 kg slides over a distance of 10 m on a horizontal surface. If the co-efficient of friction between the surfaces is 0.4, then the work done against friction (in J) is :
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A block of mass 100 kg slides over a distance of 10 m on a horizontal surface. If the co-efficient of friction between the surfaces is 0.4, then the work done against friction (in J) is :

G1 Physics · Accepted Answer

Given, m = 100 kg s = 10 m μ = 0.4 g = 10 m/s² Friction force, f = μmg = 0.4 × 100 × 10 = 400 N Work done against friction, W = fs = 400 × 10 = 4000 J