Answer:
a) 8.80 N
b) 4.78 N
Explanation:
The weight of the book is
By Newton's third law, the reaction from the table, R, is equal to its weight.
R = 19.9143 N
From the law of solid friction,
F is the maximum frictional force and is the coefficient of friction.
a) The force needed to begin moving the book is that needed to overcome static friction
b) The force needed to move the book at constant speed once it begins moving is that needed to overcome kinetic friction