1. The problem statement, all variables and given/known data Because of a frictional force of 2.6N, a force of 2.8N must be applied to a textbook in order to slide it along the surface of a wooden table. The book accelerates at a rate of 0.11 m/s a) What is the unbalanced force on the book? b) What is the mass of the book? 2. Relevant equations 3. The attempt at a solution The frictional force of 2.6 has anything to do with the equation F=ma to find the mass? If yes, what is the equation?