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A book weighing 5 N rests on top of a table.
MFS_3l_3.jpg
1.A downward force of magnitude 5 N is exerted on the book by the force of
 
  the table
  gravity
  inertia
.  
2. An upward force of magnitude _____ is exerted on the _____ by the table.
A. 6N/table
B. 5N/table
C. 5N/book
D. 6N/book
 
3. Do the downward force in Part A and the upward force in Part B constitute a 3rd law pair?
 
  yes
  no
   
4. The reaction to the force inPart B is a force of magnitude _____, exerted on the _____ by the_____. Its direction is _____.
A. 5N/ Table/ Book/ Upward
B. 5N/ Table/ Earth/ Upward
C. 5N/ Book/ Table/ Upward
D. 5N/ Table/ Book/Downward
E. 5N/ Earth/ Book/ Downard
 
5. Which of Newton's laws indicates that the forces in Parts A and B are equal and opposite?
 
 
  Newton's 1stor 2nd law
  Newton's 3rdlaw
   
6. Which of Newton's laws dictates that the forces in Parts B and Eare equal and opposite?
 
 
  Newton's 1stor 2nd law
  Newton's 3rdlaw

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B. Haranadh Kumar
B. Haranadh KumarLv10
8 Oct 2020
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Related textbook solutions

Physics: Principles with Applications
7th Edition, 2013
Giancoli
ISBN: 9780321625922

Related questions

A book weighing 5 N rests on top of a table. A downward force of magnitude 5 N is exerted on the book by the force of

a. table

b. gravity

c. inertia

 

 

A) A siring is tied to a book and pulled lightly as shown at right. The book remains in contact with the table and does not move. 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.

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 (i.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.

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 Newtons third law they are (action-reaction) force pair, so the normal force is always equal to the weight of the book." Do you agree with the student? Explain why you agree or disagree.

D) Consider a book on top of a level table while the book is being pressed straight down by a hand. In the space below, draw a free-body diagram for the book. Label the forces as you did in the tutorial Forces. 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 (i.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 hand is pressing down on the book.

E) When the hand is pushing down on the book, 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?

This problem introduces the concept of tension. The example is a rope, oriented vertically, that is being pulled from both ends. Let Fu and Fd (with u for up and d for down) represent the magnitude of the forces acting on the top and bottom of the rope, respectively. Assume that the rope is massless so that its weight is negligible compared with the tension. (This is not a ridiculous approximation-modern rope material such as Kevlar can carry tensions thousands of times greater than the weight of tens of meters of such rope.)

Consider the three sections of rope labeled a, b, and c in the figure.

  • At point 1, a downward force of magnitude Fad acts on section a.
  • At point 1, an upward force of magnitude Fbu acts on section b.
  • At point 1, the tension in the rope is T1.
  • At point 2, a downward force of magnitude Fbd acts on section b.
  • At point 2, an upward force of magnitude Fcu acts on section c.
  • At point 2, the tension in the rope is T2.

(A) What is the magnitude Fad of the downward force on section a?

(B) What is the magnitude Fbu of the upward force on section b?

(C) The magnitude of the upward force on c, Fcu, and the magnitude of the downward force on b, Fbd, are equal because of which of Newton's laws?

(D) The magnitude of the force Fbu is ______ Fbd.

(E) Now consider the forces on the ends of the rope. What is the relationship between the magnitudes of these two forces?

(a) Fu > Fd

(b) Fu = Fd

(c) Fu < Fd

(F) The ends of a massless rope are attached to two stationary objects (e.g., two trees or two cars) so that the rope makes a straight line. For this situation, which of the following statements are true?

(a) The tension in the rope is everywhere the same.

(b) The magnitudes of the forces exerted on the two objects by the rope are the same.

(c) The forces exerted on the two objects by the rope must be in opposite directions.

(d) The forces exerted on the two objects by the rope must be in the direction of the rope.

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