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 16.2, Problem 2bTH
As the elevator approach its destination, its speed decreases. (It continues to move downward.)
i. How does the acceleration of crate A compare to that of crate B? Explain.
ii. In the spaces provided below, draw and label separate free-body diagram for the crates in this case.
iii. Rank the forces on the crates according to magnitude, from largest to smallest. Explain your reasoning, including how you used
iv. In the spaces provided at right, draw arrows to indicate the direction of the net force on each crate. If the net force on either crate is zero, state so explicitly. Explain.
Is the magnitude of the net force acting on crate Agreater than, less than, or equal to that on crate B? Explain.
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Two masses B and C are connected with a string passing over a friction less pully, assuming the coefficient of friction between the table and block is μ=0.4 , and the acceleration of gravity g=9.81 m/s2. Solve the following questions (show all the steps of your calculations):
A. Draw the free body diagram of the two masses.B. Find an expression of the acceleration of the two masses in terms of ?? and ??.C. Determine the tension in the rope in terms of ?? and ??.D. If ??= ʎ kg, ?? = (ʎ-5) kg, determine the acceleration of two blocks and the tension in the rope.(ʎ= the final two numbers of your ID +10, and, gravitational acceleration, g = 9.81 m/s2).
2. Consider the three masses connected as shown below. The inclined plane makes an
angle 0 with the horizontal and the coefficient of kinetic friction for all surfaces is pa. The
pullies are massless and frictionless. The mass m, moves downward as shown. Answer
the following questions.
a) Draw the free body diagrams for cach of the masses.
b) Apply Newton's second law to each of the masses. DO NOT solve the equations yet.
Just set them up.
c) Solve your equations in part b) for the acceleration of the system. Your expression
for the acceleration should only contain mi, m2, m3, 0, pk, and various constants.
1. Your free body diagram for Part 1 should have looked it this.
F.
max
Drag and drop the heads and tails of the vectors to construct the free-body diagram.
Note: the applied force is directed to the right.
Note: the angles may be within ±15°, and the magnitudes are not considered.
=
Suppose you have a 120-kg wooden crate resting on a wood floor. Use µg = 0.5 and μ = 0.3
. Assume all quantities are correct to 3 significant figures.
a = 1.96
ffric; 180°
(b) What is the maximum force you can exert horizontally on the crate without moving it?
Enter to 3 significant figures
✔N
N: 90°
a
m/s²
mg; 270°
F:0°
(c) If you continue to exert this force once the crate starts to slip, what will its acceleration then
be?
Enter to 3 significant figures
Chapter 16 Solutions
Tutorials in Introductory Physics
Ch. 16.1 - Draw a freebody diagram for the book. Label each...Ch. 16.1 - How do the forces exerted on the book in this case...Ch. 16.1 - Consider the following statement made by a student...Ch. 16.1 - Consider a book on top of a level table while the...Ch. 16.1 - Review your answer to part a. In addition, reread...Ch. 16.1 - In the spaces below, draw a free-body diagram for...Ch. 16.1 - Identify all the Newton’s third law...Ch. 16.1 - Rank, from largest to smallest, the magnitudes of...Ch. 16.1 - Draw and label a freebody diagram for system S12 .Ch. 16.1 - Compare the forces that appear on your free-body...
Ch. 16.1 - Let C represent the system consisting of the whole...Ch. 16.1 - A block is at rest on an incline as shown below at...Ch. 16.1 - A block is at rest on an incline as shown below at...Ch. 16.1 - A block is at rest on an incline as shown below at...Ch. 16.1 - Draw a free-body diagram for the book. Label the...Ch. 16.1 - For each force that appears on your free-body...Ch. 16.2 - In the spaces provided draw and label separate...Ch. 16.2 - Rank the magnitudes of all the horizontal forces...Ch. 16.2 - Are any of the forces that you drew for instant 1...Ch. 16.2 - Are any of the forces that you drew for instant 1...Ch. 16.2 - Two creates, A and B, are in an elevator as shown....Ch. 16.2 - As the elevator approach its destination, its...Ch. 16.2 - Prob. 3aTHCh. 16.2 - The vector representing the acceleration systems A...Ch. 16.2 - The vector representing the net force on system A...Ch. 16.2 - The vector representing the frictional force on...Ch. 16.2 - Prob. 4bTHCh. 16.2 - Prob. 4cTHCh. 16.2 - Prob. 4dTHCh. 16.2 - Prob. 5aTHCh. 16.2 - Using only the forces in your free-body diagram...Ch. 16.2 - Using only the forces in your free-body diagrams...Ch. 16.2 - Suppose the friction between the two blocks is...Ch. 16.3 - Draw an arrow to indicate the direction of the...Ch. 16.3 - Draw an arrow to indicate the direction of force...Ch. 16.3 - Draw and label a free-body diagram for the block...Ch. 16.3 - Prob. 2THCh. 16.3 - Describe the motion of each of the systems A, B,...Ch. 16.3 - Draw vectors below to represent the acceleration...Ch. 16.3 - Draw and label separate freebody diagrams for...Ch. 16.3 - Rank the magnitudes of the net forces on systems...Ch. 16.3 - Write expressions for the tension in strings P and...
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