You are holding your physics book against the wall by pressingon it with a force directed straight into the wall. (a) You are pressing hard enough so that the book doesn’t move.Drawing a free-body diagram for the book and identifying all theforces that are acting on the book. Assuming the force from thehand is directly to the right, 1) Is there a normal force on the book from the wall (Y for\"yes\", N for \"no\", or U for \"unknown\") 2) The direction for the normal force on the book from the wallis (R, L, U, D, 0 for right, left, up, down, none) 3) Is there a friction force on the book from the contact withthe wall (Y for \"yes\", N for \"no\", or U for \"unknown\") 4) The direction for the friction force on the book from thecontact with the wall is (R, L, U, D, 0 for right, left, up, down,none) 5) Is there a gravitational force on the book from the Earth (Yfor \"yes\", N for \"no\", or U for \"unknown\") 6) The direction for the gravitational force on the book fromthe Earth is (R, L, U, D, 0 for right, left, up, down, none) 7. What relations are there among the forces in your diagram?That is, which forces or sums of forces have to be equal? How doyou know? (this question will not be auto-graded, answer fully)

8. You begin to get tired and the book begins to slide down. Thebook begins to slide down, and you respond so it slides down at aconstant velocity. How do each of the forces you have identifiedchange from their magnitudes in part (a)? Explain how you know.(this question will not be auto-graded, answer fully)

9. If the book has a mass of 2 kg, the coefficient of frictionbetween the sliding book and the wall is 0.4, how hard do you haveto press on the book if it is sliding down with a speed of 2 cm/s?D2M

10. BCD on 9