posted by Ika .
A student puts a 0.80 kg book against a vertical wall and pushes the book toward the wall with a force of 26N [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.
A student places a ladder up against a wall as shown below. The normal force applied by the wall on the ladder will be directed: