A bar weighing 0.3 kg is pulled with a dynamometer on the table. The bar moves evenly.
| June 9, 2021 | education
A bar weighing 0.3 kg is pulled with a dynamometer on the table. The bar moves evenly. Dynamometer reading 0.6 H. What is the coefficient of sliding friction?
To find the value of the coefficient of sliding friction between the table and the specified bar, we use the formula: m * a = 0 = F – Ffr = F – μ * m * g, whence μ = F / (m * g).
Data: F – force moving the specified bar (F = 0.6 N); m is the mass of the bar (m = 0.3 kg); g – acceleration due to gravity (g ≈ 10 m / s2).
Calculation: μ = F / (m * g) = 0.6 / (0.3 * 10) = 0.2.
Answer: The coefficient of sliding friction between the table and the indicated bar is 0.2.
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