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.

Question

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.

Answer 1

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:

Answer 2

0.30

Answer 3

0.30