In a laboratory experiment on friction, a 135-N block resting on a rough horizontal table is pulled by a horizontal wire. The pull gradually increases until the block begins to move and continues to increase thereafter. The figure shows a graph of the friction force on this block as a function of the pull. Identify the following: Identify the regions of the graph on the x-axis where static friction occur. Identify the regions of the graph on the x-axis where kinetic friction occur. Find the coefficients of static friction between the block and the table. Find the coefficients of kinetic friction between the block and the table. What will happen to the coefficients of friction if a 135-N brick were placed on the box?

In a laboratory experiment on friction, a 135-N block resting on a rough horizontal table is pulled by a horizontal wire. The pull gradually increases until the block begins to move and continues to increase thereafter. The figure shows a graph of the friction force on this block as a function of the pull. Identify the following: Identify the regions of the graph on the x-axis where static friction occur. Identify the regions of the graph on the x-axis where kinetic friction occur. Find the coefficients of static friction between the block and the table. Find the coefficients of kinetic friction between the block and the table. What will happen to the coefficients of friction if a 135-N brick were placed on the box?

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter5: More Applications Of Newton’s Laws

Section: Chapter Questions

Problem 2P

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In a laboratory experiment on friction, a 135-N block resting on a rough horizontal table is pulled by a horizontal wire. The pull gradually increases until the block begins to move and continues to increase thereafter. The figure shows a graph of the friction force on this block as a function of the pull. a. Why does the graph slant upward in the first part but then level out? b. What would the graph look like if a 135-N brick were placed on the box, and what would the coefficients of friction be in that case?
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