The friction force is directly proportional to the coefficient of friction and the reaction force of the support, which means that the problem is solved by the formula F = kN (The formula perfectly reflects the direct relationship). Here F is the friction force, N is the support reaction force, k is the friction coefficient. There is a pattern in the formula, N = F / k, k = F / N. That is, to find the coefficient of friction, you need to divide the friction force by the reaction force of the support. Example: F = 6, N = 3. 6 = k * 3, k = 6/3, k = 2. Let’s check that 2 * 3 is really equal to 6, which means the problem has been solved correctly and the pattern has been established correctly.
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