A particle is pulled along a curved surface very slowly. The coefficient of kinetic friction between the particle and surface is $0.4$ . The heat generated during the pulling of the particle from the lowest point $A$ to the topmost point $B$ equals (The mass of the particle is $5 g$ )

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Heat generated = work done by friction = μ m g L = 0.4 × 5 × 10 - 3 × 10 × 5 = 10 - 1 j o u l e = 0.1 J

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