Tutorials in Introductory Physics
1st Edition
ISBN: 9780130970695
Author: Peter S. Shaffer, Lillian C. McDermott
Publisher: Addison Wesley
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Textbook Question
Chapter 2.2, Problem 1cT
Is the magnitude of the force exerted on system A by system B greater than, less than, or equal to the magnitude of the force exerted on system B by system A? Explain.
Would your answer change if the hand were pushing system B to the left instead of pushing system A to the right? If so, how? If not, why not?
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Students have asked these similar questions
A) The students draw the following Free Body Diagram for the situation. Is thế Freë
Body Diagram correct? Check the directions of all of the
forces and make sure that the students didn't miss any
forces. Fix any mistakes that you find.
B) The students next wrote the following statement for
Newton's 2nd Law for the system:
Fn
2Mg
T
EF
system
= (2M + M)a =F +FN- 2Mg - T +T – Mg . Is this correct? Fi:
mistakes that the students made and explain why they were mistakes.
C) A second student noticed that this equation can't be solved for Tensi
Instead, they wrote the following equation for Block 2M: EF
M
Block 2M = 0 =
luded thatT must be 40N Is this correct? If not, explain why not.
Mg
Replace the three forces shown by an equivalent force-couple system at point A. If the forces are replaced by a single resultant force,
determine the distance d below point A to its line of action.
230 N
420 mm
420 mm
130 N
420 mm
270 N
Answers:
Force-couple system at A. The force is positive if to the right, and the couple is positive if counterclockwise.
R =
i
N
M =
i
N-m
Single resultant force.
d =
i
mm
Draw a diagram of the situation and label the givens in the problem: The cart's mass and the hanger's mass. Also label the direction of the cart and hanger's acceleration.
Draw two force diagrams. One for the cart and one for the hanger. You can treat the track as frictionless. Remember that the force in the string will be the same throughout the entire string.
Then define an x-y coordinate system and find the x and y components of the forces in your diagrams.
Chapter 2 Solutions
Tutorials in Introductory Physics
Ch. 2.1 - Draw a large dot on your large sheet of paper to...Ch. 2.1 - Describe the remaining forces you have indicated...Ch. 2.1 - All forces arise from interactions between...Ch. 2.1 - There are many different types of forces,...Ch. 2.1 - Consider the following discussion between two...Ch. 2.1 - Label each of the forces on your free-body diagram...Ch. 2.1 - Sketch a free-body diagram for a book at rest on a...Ch. 2.1 - A second book of greater mass is placed on top of...Ch. 2.1 - Compare the free-body diagram for the lower book...Ch. 2.1 - Which, if any, Newton’s third law force pairs are...
Ch. 2.1 - A magnet is supported by another magnet as shown...Ch. 2.1 - An iron rod is held up by a magnet as shown. The...Ch. 2.2 - Compare the net force (magnitude and direction) on...Ch. 2.2 - Draw separate free-body diagrams for system A and...Ch. 2.2 - Is the magnitude of the force exerted on system A...Ch. 2.2 - D. Identify all the Newton's third law...Ch. 2.2 - Rank the magnitudes of the horizontal forces that...Ch. 2.2 - Suppose the mass of each brick is 2.5 kg, the...Ch. 2.2 - Describe the motions of systems A and B. How does...Ch. 2.2 - Compare the net force (magnitude and direction) on...Ch. 2.2 - Draw and label separate free-body diagrams for...Ch. 2.2 - Consider the following discussion between two...Ch. 2.2 - Rank the magnitudes of all the horizontal forces...Ch. 2.2 - Compare the magnitude of the netforce on system C...Ch. 2.2 - Draw and label a free-body diagram for system C....Ch. 2.2 - At right is a free-body diagram for a cart. All...Ch. 2.3 - Describe the motions of block A, block B, and the...Ch. 2.3 - On a large sheet of paper, draw a separate...Ch. 2.3 - Identify all the Newton's third law...Ch. 2.3 - Rank, from largest to smallest, the magnitudes of...Ch. 2.3 - Consider the horizontal components of the forces...Ch. 2.3 - If the motion of the blocks is the same as in...Ch. 2.3 - Suppose the mass of the string that connects...Ch. 2.3 - A string exerts a force on each of the two objects...Ch. 2.3 - If you know that the net force on a massless...Ch. 2.3 - Predict the subsequent motions of objects A and B...Ch. 2.3 - Draw separate free-body diagrams for objects A and...Ch. 2.3 - Predict: • what will happen to object C when it is...Ch. 2.3 - Draw and label separate free-body diagrams for...Ch. 2.3 - The weight of a 200 g mass has magnitude...Ch. 2.3 - Consider the following statement about the...
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