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 5dTH
Suppose the friction between the two blocks is reduced so that block B slides down as the blocks move to the right. The downward component of the acceleration of block B is 1 m/s2.
i. For block A and block B: (a) draw new free-body diagrams and (b) write out the algebraic form of Newton’s second law.
ii. Is the magnitude of the force exerted on block A by the ground in this case greater than, less than, or equal to the force exerted on block A by the ground in part c? Explain.
iii. Calculate the magnitude of the force exerted on block A by the ground. Show your work.
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Students have asked these similar questions
c. Suppose the incline in part b is now
placed on a frictionless table.
Frictionless
i. Is the net force on the block
always zero? Explain.
ii. Is the net force on the incline always zero? Explain.
iii. Is the net force on the block-incline system always zero? Explain.
iv. Is the momentum of the block conserved? Explain.
v. Is the momentum of the incline conserved? Explain.
vi. Is the momentum of the block-incline system conserved? Explain.
4. A 10 kg block on a level surface is pushed by a 50 N force directed 30 degrees below the horizontal
(like this: ). The coefficient of static friction between the block and the surface is 0.60 and the
coefficient of kinetic friction is 0.40.
a. Does the block slide or stay put? Justify your answer with a calculation.
b. If it slides, calculate its acceleration. If it stays put, calculate the friction force acting on the block. Show
your work.
Part A
A block lies on a plane raised an angle e fram the horizantal. Three forces act upon the block: Fw, the force of gravity. Fn. the narmal force; and Fr. the force of
friction. The coefficient of friction is large enaugh to prevent the block from sliding (Figure 1).
Consider coordinate system a, with the x axis along
e plane. Which forces lie along the axes?
O Ée arly
O F, anly
O F. only
O ři and F.
O ř and F.
O řa and F.
O ř and řa and ř.
Submit
Requect Ancwor
Part B
Which forces lie along the axes af the coordinate system b, in which the y axis is vertical?
O F anly
O F. anly
O F. only
O F and P,
O ř and F.
O F, and F.
O řr and Fa and Ě,
Submit
Request Answer
Usually the best advice is to choose a coordinate system so that the acceleration of the system is directly along one of the coordinate axes. If the system isn't accelerating, then you are better off choosing the coordinate system with the most vectors along the coordinate axes.
But now you are gaing to ignore that advice.…
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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