Muhammad does an experiment where he uses a string attached to a spring scale to pull horizontally on a wooden block of unknown mass. He uses a second spring scale to push down on the block, exerting a series of forces F1 on B on it. For each of these downward forces, he pulls horizontally on the spring scale attached to the string to determine the maximum force F2 on B he can exert on the block in the horizontal direction before it slides. He records all of his measurements in the table below. Determine (a) the mass of the block and (b) the coefficient of friction between the block and the table.

International Edition---engineering Mechanics: Statics, 4th Edition
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ISBN:9781305501607
Author:Andrew Pytel And Jaan Kiusalaas
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Chapter7: Dry Friction
Section: Chapter Questions
Problem 7.50P: The block of weight W is pulled by the force P inclined at the angle to the horizontal. Find the...
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Muhammad does an experiment where he uses a string attached to a spring scale to pull horizontally on a wooden block of unknown mass. He uses a second spring scale to push down on the block, exerting a series of forces F1 on B on it. For each of these downward forces, he pulls horizontally on the spring scale attached to the string to determine the maximum force F2 on B he can exert on the block in the horizontal direction before it slides. He records all of his measurements in the table below. Determine (a) the mass of the block and (b) the coefficient of friction between the block and the table.

Muhammad does an experiment where he uses a string attached to a spring scale to pull
horizontally on a wooden block of unknown mass. He uses a second spring scale to push
down on the block, exerting a series of forces F1 on B on it. For each of these downward
forces, he pulls horizontally on the spring scale attached to the string to determine the
maximum force F2 on B he can exert on the block in the horizontal direction before it slides.
He records all of his measurements in the table below.
Flon B (N)
F2 on B (N)
1
2.71
2
3.25
3
3.81
4
4.34
5
4.91
Instructions
In a neat and organized fashion, write out a solution which includes the following:
1. A sketch of the physical situation with all given physical quantities clearly labeled.
2. A force diagram showing the forces exerted on the block during one trial of Muhammad's
experiment and a graph of the data he collected.
3. Use your representations to determine (a) the mass of the block and (b) the coefficient of
friction between the block and the table. Show all steps you take and explain the thought
process behind each step as you work.
4. Evaluate your answer to determine whether it is reasonable or not.
Transcribed Image Text:Muhammad does an experiment where he uses a string attached to a spring scale to pull horizontally on a wooden block of unknown mass. He uses a second spring scale to push down on the block, exerting a series of forces F1 on B on it. For each of these downward forces, he pulls horizontally on the spring scale attached to the string to determine the maximum force F2 on B he can exert on the block in the horizontal direction before it slides. He records all of his measurements in the table below. Flon B (N) F2 on B (N) 1 2.71 2 3.25 3 3.81 4 4.34 5 4.91 Instructions In a neat and organized fashion, write out a solution which includes the following: 1. A sketch of the physical situation with all given physical quantities clearly labeled. 2. A force diagram showing the forces exerted on the block during one trial of Muhammad's experiment and a graph of the data he collected. 3. Use your representations to determine (a) the mass of the block and (b) the coefficient of friction between the block and the table. Show all steps you take and explain the thought process behind each step as you work. 4. Evaluate your answer to determine whether it is reasonable or not.
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