Determine the coefficient of friction between the washer and the horizontal surface, if during free movement on it, the washer slows down with an acceleration of 2 m / s2.
1. According to Newton’s second law, a = F tr / m, where m is the mass of the washer, a is the acceleration of the movement of the washer, F tr is the friction force.
2. The friction force, by definition, is calculated by the formula: F tr = k * P = k * m * g, where k is the coefficient of friction, P is the weight of the washer, m is the mass of the washer, g is the acceleration of gravity, which is 9.8 m / s2.
3. That is, we got the equation: k * g * m / m = a. Hence k = a / g = 2 / 9.8 ~ 0.2.
Answer: The coefficient of friction is approximately 0.2.
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