1. The problem statement, all variables and given/known data An inclined plane at 30.0° is 4.9 m long. A book which has a coefficient of kinetic friction with the inclined plane of 0.16 is placed at the top and immediately begins to slide. How long will it take for the book to reach the bottom of the incline? 2. Relevant equations a=mg sin(angle)-coeff of kinetic friction cos(angle) t2= Xf/(1/2)(a) 3. The attempt at a solution i tried it and i have had different answers every time due to some mistakes, but i have only one attempt left.