I'm struggling solving this problem that says A student puts a 0.80 kg book against a vertical wall and pushes on the book toward the wall with a force of 26 N [R]. The book does not move.(a) Calculate the minimum coefficient of static friction. (b) Describe two ways the student could make the book accelerate down without changing the applied force.

#8. A student puts a 0.80 kg book against a vertical wall and pushes on the book toward the wall with a force of 26 N [R]. The book does not move. T/i (a) Calculate the minimum coefficient of static friction. (b) Describe two ways the student could make the book accelerate down without changing the applied force. [1-4]