Answer Happy

1. A string is tied to a book and pulled lightly as shown at right. The book String remains in contact with the table and does not move. Book a Draw a free-body diagram for the book. Label each of the forces exerted on the book as you were instructed in the tutorial Forces. N- rormel free Table my w due to party I due to the stry b. How do the forces exerted on the book in this case compare to the forces exerted on the book when the string is not present? List any forces that are the same (l.e., same type of force, same direction, and same magnitude) in both cases. Make a separate list of forces that change (or are not present) when the string is pulled. if there is to stay, for is no Teisin but a stal has normed w eight due to pravity c. Consider the following statement made by a student about a book at rest on a level table: "The two forces exerted on the book are the normal force directed up and the weight of the book directed down. These are equal and opposite to one another. By Newton's third low they are a third low (action-reaction) force pair, so the normal force is always equal to the weight of the book." force Do you agree with the student? Explain why you agree or disagree. This scutenent is correct e nos accordy to Neton 3rd Law, the dovanout there a upward Normal TANY Lories are resome in creation and spine in rahitude. d. Consider a book on top of a level table while the book is being pressed straight down by a hand. i. In the space below, draw a free-body diagram for the book. Label the forces as you did in the tutorial Forces. il. How do the forces exerted on the book in this case compare to the forces exerted on the book when the hand is not pushing? List any forces that are the same le same type of force, same direction, and same magnitude) in both cases. Make a separate list of forces that change (or are not present) when the hand is pressing down on the book. iii. Is the magnitude of the weight equal to the magnitude of the normal force exerted by the table on the book? How can you tell?