Answer:
The required friction force must be at least 328.32N and the static force is only 24.7N
Step-by-step explanation:
We need to compare the required friction force to the static friction force.
If we sum all forces on the book we get:
Fr = m*a
Where the acceleration can be calculated as:


Replacing this value we get:
Fr = 328.32N
Now, the static friction is given by:

Since this value is smaller than the previously-calculated required friction, we state that the book will definitely slide.