a book of weight 20N is pressed between two hands and each hand excerts a force of 40N if the book just starts to slides down.coefficient of frction

Answers (1)

Weight of book = Frictional force between hands and book
mg = μN
20 = μ(40 + 40)
μ = 20 / 80
μ = 0.25

Coefficient of friction is 0.25

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