A car weighing 1000 kg travels 200 m in 10 seconds, find the working friction force knowing that the coefficient is 0.05.

univerkov | September 11, 2021 | education

Task data: m (weight of the taken vehicle) = 1000 kg; t (duration of movement) = 10 s; S (distance traveled) = 200 m; μ (coefficient of friction) = 0.05.

Reference values: g (acceleration due to gravity) ≈ 10 m / s2.

To find the work of the friction force, we use the formula: A = -Ftr. * S = -μ * N * S = -μ * m * g * S.

Let’s calculate: A = -0.05 * 1000 * 10 * 200 = -100,000 J = -100 kJ.

Answer: The sought work of the friction force is -100 kJ.

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