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 2.1, Problem 1eT
Consider the following discussion between two students.
Student 1: “I think the free-body diagram for the block should have a force by Chris, a force by the rope, and a force by Pam.”
Student 2: “I don’t’ think the diagram should show a force by Pam. People can’t exert forces on blocks without touching them.”
With which student, if either, do you agree? Explain your reasoning.
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To be clear: You must write the words "Newton's Second Law" and point to an example of it within your solution! Write out the second law using symbols, not numbers. Writing "net force = m a" does not qualify because that could be written for any object. The symbols and subscripts should clearly refer to specific forces in each diagram. Examples, good and bad, of what might qualify are shown below.
The following are three examples of Newton's second law written for an object called "E" (which is not in this question). Credit would be given for the first example but not for the second or third.
This is a good example: mE g−TEJ sinθ1+NER cosθ2=mE a
This is a bad example that is not specific enough: Σ FE=mE a
This is a bad example with unspecified numbers and without symbols: (1.7 kg) g−(3.8 N) sin(59∘)+(4.9 N)cos(34∘)=(1.7 kg) a
Once you have begun your solution with symbols in Newton's Second Law, you may begin to substitute numbers as needed.
Find I and J values and please answer all parts of this question
1. Block 1 (3.5 kg) is resting on the surface of a table.
On a sheet of paper, draw the free body diagram for block 1 using the two-subscript notation from class. After completing the free body diagram, enter below each force and its x & y-components. (use g = 10 m/s2) Remember that the x-component is the "i" component and the y-component is the "j" component.
FORCES on BLOCK 1
Weight force on block 1 by Earth: 100 (two-subscript notation)
The Weight on block 1 by the Earth has the notation: W1E.
Value = ———i + ——- j N
Remember that W1E points down (negative y-value) with a magnitude of m1 * g.
Normal force on block 1 by Surface: (two-subscript notation)
Value = ——i +——- j N
What is the answer? Show your complete solution. Step-by-step with Free body diagram. Simplify your final answer without the use of calculator.
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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