Physics Laboratory Experiments
8th Edition
ISBN: 9781285738567
Author: Jerry D. Wilson, Cecilia A. Hernández-Hall
Publisher: Cengage Learning
expand_more
expand_more
format_list_bulleted
Concept explainers
Videos
Question
Chapter 11, Problem 1ASA
To determine
The three general empirical rules to describe friction.
Expert Solution & Answer
Answer to Problem 1ASA
The three general empirical rules to describe friction are given below.
Explanation of Solution
Friction refers to the force resisting the relative motion between contacting material surfaces, fluid layers and material elements sliding against each other.
The three general emipirical rules for frriction includes:
- Firctional force is independent of the surface area of contact.
- Frictional force is directly propotional to the load, the perpendicular component of the force pressing the surfaces together.
- Frictional force is independent of the sliding speed.
Conclusion:
Thus, the three general empirical rules to describe friction are given above.
Want to see more full solutions like this?
Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!
Students have asked these similar questions
Which statement about kinetic friction
and static friction is true?
(Some of the options mention a
horizontal force that friction opposes.
This means that a force is pulling
horizontally and friction is acting in the
opposite direction.)
Your answer:
The force of kinetic friction changes
if the speed of the object decreases.
The force of kinetic friction changes
if the horizontal force (or forces) it
opposes gets weaker.
The force of static friction changes if
the speed of the object decreases.
The force of static friction changes if
O the horizontal force (or forces) it
opposes gets weaker.
A 2.0kg block rests on a level surface. The coefficient of static friction is μs= 0.60, and the coefficient of kinetic friction is μs = 0.40 A horizontal force , F, is applied to the block. As F is increased, the block begins moving. describe how the force of friction varies as F increases from the moment the block is at rest to when it begins moving. Indicate how you could determine the force of friction at each value of F - before the block starts moving, at the point it starts moving, and after it is moving. please show all work.

A 29.0-kg box is released on a 28 degree incline and accelerates down the incline at 0.26 m/s.
Find the friction force impeding its motion.
Express your answer to two significant figures and include the appropriate units.
Determine the coefficient of kinetic friction.
Express your answer using two significant figures.
Chapter 11 Solutions
Physics Laboratory Experiments
Ch. 11 - Prob. 1ASACh. 11 - What is the normal force, and why is it used...Ch. 11 - Why is it important to have the string parallel to...Ch. 11 - What is the coefficient of friction, and in what...Ch. 11 - Explain how graphs of weight versus normal force...Ch. 11 - Explain why fs sN; that is, why is fs less than...Ch. 11 - Speculate, in terms of the microscopic surface...Ch. 11 - (a) Prove that tan is equal to k when the block...Ch. 11 - Suppose that the block were made to move up the...
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.Similar questions
- A block of mass 5.40 kg is pushed up against a wall by a force P that makes an angle of = 50.0° angle with the horizontal as shown below. The coefficient of static friction between the block and the wall is 0.300. (a) Determine the possible values for the magnitude of P that allow the block to remain stationary. (If there is no maximum, enter NONE in that answer blank.) P. maxl= IP A N X Your response differs from the correct answer by more than 10%. Double check your calculations. N P Pminh, = 92.32 (b) What happens if IP has a larger value than IP The block slides up the wall. The block does not slide along the wall. The block slides down the wall. |Pmaxl = P min! = What happens if IP has a smaller value than IP min!? The block slides up the wall. O The block does not slide along the wall. The block slides down the wall. (c) Repeat parts (a) and (b) assuming the force makes an angle of = 12.0° with the horizontal. Determine the possible values for the magnitude of P that allow the…arrow_forwardA horizontal force P of 379 N is applied on the crate of weight W=870 N. Initially the crate is left motionless. Find the magnitude and direction of friction force that are applied by the flat surface on the crate. Take the value of coefficient of static friction as 0.47 and the value of coefficient of kinetic friction as 0.33. a. ) The magnitude of friction force is 322 N and it is acting in the direction b. ) The magnitude of friction force is 379 N and it is acting in the direction c. ) The magnitude of friction force is 322 N and it is acting in the direction d.) The magnitude of friction force is 379 N and it is acting in the directionarrow_forwardA 11 N horizontal force pushes a block weighing 5.4 N against a vertical wall (see the figure). The coefficient of static friction between the wall and the block is 0.56, and the coefficient of kinetic friction is 0.34. Assume that the block is not moving initially.(a) Will the block move? ("yes" or "no") (b) In unit-vector notation Fi + Fj, what is the force on the block from the wall? (a) (b) Number i î+ i Ĵ Unitsarrow_forward
- A block is pulled by a rope at constant speed along a rough level surface by a rope that makes an angle of 30 degrees with respect to the horizontal. The applied force along the rope is p The force of kinetic friction between the block and the surface is 10 N.a.Which one of the following expressions gives the magnitude of the force ?10sin 30 degree or 10cos 30degrees b. Complete the following statement: The magnitude of the normal force could be reduced by A. decreasing the angle made by the rope. B. increasing the speed of the block. C. decreasing the coefficient of kinetic friction. D. increasing the angle made by the rope. c. Which of the following actions will increase the frictional force on the block? A. increasing the angle made by the rope B. increasing the weight of the block C. decreasing the speed of the block D. increasing the contact surface areaarrow_forwardIn 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. Figure shows a graph of the friction force on this block as a function of the pull. (a) Identify the regions of the graph where static friction and kinetic friction occur. (b) Find the coefficients of static friction and kinetic friction between the block and the table. (c) Why does the graph slant upward at first but then level out? (d) What would the graph look like if a 135 N brick were placed on the block, and what would the coefficients of friction be?arrow_forwardA 7.3 kg box slides across the floor, experiencing a force of friction of 17.885 N [backward]. Determine the coefficient of kinetic friction between the box and the floor. What are the materials of the box and the floor? (use the chart attached here) Question 9 options: Copper and steel Waxed wood on wet snow Wood on wood Rubber on wet concrete hint μ=FfFgarrow_forward
- Mass mB = 25 kg is on a horizontal surface connected by a rope over a pulley to mass mA = 15 kg. Static friction keeps the blocks stationary. What is the minimum coefficient of static friction between mB and the table? Give your answer in the appropriate number of significant digits.arrow_forwardA block with a mass of 10.09 kg is placed on a ramp. The ramp has an incline of ? = 25.7 degrees from the horizontal. The static coefficient of friction between the block and ramp is μs = 0.211, and the kinetic coefficient of friction between the block and ramp is μk = 0.112. A force, F, is exerted on the block as shown. Note that the force F is parallel with the ramp. What is the smallest value (magnitude) for the force, F, in Newtons that can be exerted on the block to hold the block stationary on the ramp? What is the largest value (magnitude) for the force, F, in Newtons that can be exerted on the block while still holding the block stationary on the ramp? What value (magnitude) for the force, F, is needed to move the block up the ramp at a constant speed?arrow_forwardA 12 N horizontal force pushes a block weighing 5.0 N against a vertical wall . The coefficient of static friction between the wall and the block is 0.60, and the coefficient of kinetic friction is 0.40. Assume that the block is not moving initially. (a) Will the block move? (b) In unit-vector notation, what is the force on the block from the wall?arrow_forward
- Tires that are rolling across the road use static friction, and tires that slide across the road use kinetic friction. Which combination of motion and coefficient of friction (between the tire and the road) would allow a car to stop in the shortest amount of time? Your answer: a high coefficient of friction with a tire that rolls across the road a high coefficient of friction with a tire that slides across the road a low coefficient of friction with a tire that rolls across the road a low coefficient of friction with a tire that slides across the roadarrow_forwardA block weighs 100. N and rests on a horizontal surface. If Ms = 0.50 and uk = 0.20 between the block and the horizontal surface, then (a) What is the magnitude of the frictional force acting on the block? Justify your What is the magnitude of the frictional force acting on the block if a horizontal force of 35.0 N is now used to push the block? Justify your answer with a calculation. What is the magnitude of the minimum horizontally applied force that will start the block sliding? Justify your answer with a calculation. If the magnitude of the applied horizontal force on the block is 55.0 N, what is the magnitude of the frictional force acting on the block? Justify your answer with a calculation.arrow_forwardWhat is the magnitude of the static frictional force acting on the block? A block is at rest on a rough inclined plane and is connected to an object with the same mass as shown. The rope may be considered massless; and the pulley may be considered frictionless. The coefficient of m m static friction between the block and the plane is us; and the coefficient of kinetic friction is µk. a a) mg sin 0 b) mg cos 0 (c) mg (1 – sin 0) (d) mg (1 – cos 0) ... (A a в) d b D) carrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
College PhysicsPhysicsISBN:9781305952300Author:Raymond A. Serway, Chris VuillePublisher:Cengage Learning
University Physics (14th Edition)PhysicsISBN:9780133969290Author:Hugh D. Young, Roger A. FreedmanPublisher:PEARSON
Introduction To Quantum MechanicsPhysicsISBN:9781107189638Author:Griffiths, David J., Schroeter, Darrell F.Publisher:Cambridge University Press
Physics for Scientists and EngineersPhysicsISBN:9781337553278Author:Raymond A. Serway, John W. JewettPublisher:Cengage Learning
Lecture- Tutorials for Introductory AstronomyPhysicsISBN:9780321820464Author:Edward E. Prather, Tim P. Slater, Jeff P. Adams, Gina BrissendenPublisher:Addison-Wesley
College Physics: A Strategic Approach (4th Editio...PhysicsISBN:9780134609034Author:Randall D. Knight (Professor Emeritus), Brian Jones, Stuart FieldPublisher:PEARSON
College Physics
Physics
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Cengage Learning
University Physics (14th Edition)
Physics
ISBN:9780133969290
Author:Hugh D. Young, Roger A. Freedman
Publisher:PEARSON
Introduction To Quantum Mechanics
Physics
ISBN:9781107189638
Author:Griffiths, David J., Schroeter, Darrell F.
Publisher:Cambridge University Press
Physics for Scientists and Engineers
Physics
ISBN:9781337553278
Author:Raymond A. Serway, John W. Jewett
Publisher:Cengage Learning
Lecture- Tutorials for Introductory Astronomy
Physics
ISBN:9780321820464
Author:Edward E. Prather, Tim P. Slater, Jeff P. Adams, Gina Brissenden
Publisher:Addison-Wesley
College Physics: A Strategic Approach (4th Editio...
Physics
ISBN:9780134609034
Author:Randall D. Knight (Professor Emeritus), Brian Jones, Stuart Field
Publisher:PEARSON
Newton's Second Law of Motion: F = ma; Author: Professor Dave explains;https://www.youtube.com/watch?v=xzA6IBWUEDE;License: Standard YouTube License, CC-BY