Question

You are holding a 1.5 kg book motionless against a vertical wall by pressing on it, with your arm pushing with a force of 14 N at an angle of 25 degrees upward from the horizontal. You are also taking static friction into account, such that the maximum static friction force is in effect.

a. There are two other forces acting on the book, Name them.

b. Draw a force diagram labeling all forces on the book.

c. What should be the net force on the book, in either the x-direction or the y-direction?

d. Use Newton's 2nd Law to write two force equations, one for the X direction and one for the y-direction.

e. The coefficient of friction is 0.69. Find the static friction force above, using your answer to part D.

Answer 1