Physics Laboratory Manual
4th Edition
ISBN: 9781133950639
Author: David Loyd
Publisher: Cengage Learning
expand_more
expand_more
format_list_bulleted
Concept explainers
Videos
Question
Chapter 7A, Problem 1PLA
To determine
Whether the statement is true or false.
Expert Solution & Answer
Answer to Problem 1PLA
Option (a) True
Explanation of Solution
Kinetic friction is the force that acts between moving surfaces that are in mutual interaction with each other. This force always acts in the direction opposite to the motion of the object on the surface.
Therefore, the given statement is true.
Conclusion:
Option (a) is correct. For kinetic friction the direction of the frictional force on a given object is always opposite the direction of that object’s motion.
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
A particle of mass 6 kg is placed on a rough plane
inclined at an angle a to the horizontal where sin a =
0.8. The coefficient of friction between the particle
and the plane is 0.4. An upward force PN actson the
particle along a line of greatest slope of the plane.
Find
the greatest value of P
A body lies on a horizontal surface. The coefficient of friction between the body and the surface is μμ. Determine the angle α, at which, the force acting on the body to cause its movement is the minimum.
A 3.2 kg block is pushed along a horizontal floor by a force of magnitude 32 N at a downward angle θ = 40°. The coefficient of kinetic friction between the block and the floor is 0.26. Calculate the magnitudes of (a) the frictional force on the block from the floor and (b) the block’s acceleration.
Chapter 7A Solutions
Physics Laboratory Manual
Ch. 7A - Prob. 1PLACh. 7A - Static friction is (a) always less than the...Ch. 7A - The two coefficients of friction discussed in this...Ch. 7A - Suppose a block of mass 25.0 kg rests on a...Ch. 7A - For the laboratory measurement of the static...Ch. 7A - Prob. 6PLACh. 7A - Prob. 7PLACh. 7A - For either type of coefficient of friction, what...
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 m is held stationary on a ramp by the frictional force on it from the ramp. A force , directed up the ramp, is then applied to the block and gradually increased in magnitude from zero. During the increase, what happens to the direction and magnitude of the frictional force on the block?arrow_forwardA man has to push his boat on the shore across the mud to get to the water. The coefficient of friction between the boat and the mud is given by μ = 0.400. If the boat has a mass of 40 kg, calculate the magnitude of the force of friction acting on the boat.arrow_forwardA block of mass m1 = 3.9 kg is placed on top of a block with mass m2 = 5.4 kg. A force, F = is applied to m2, at an angle 16.1 degrees above the horizontal. If the coefficient of static friction between all moving surfaces is 0.42 and the coefficient of kinetic friction is 0.32, determine the magnitude of the minimum force that will get the blocks moving.arrow_forward
- Friction can be helpful in some situations but cause in other situations. (a) Describe two situations in which friction is helpful for an object moving on a horizontal surface.(b) Describe two situations in which it would be ideal if there were no friction when an object moves across a horizontal surface.arrow_forwardA 3.71 kg block is pushed along a horizontal floor by a force of magnitude 30.0 N at a downward angle 0 = 40.0%. The coefficient of kinetic friction between the block and the floor is 0.240. Calculate the magnitudes of (a) the frictional force on the block from the floor and (b) the block's acceleration.arrow_forwardA car drives onto a section of the road which is covered in ice. The driver attempts to stop by hitting the brakes but the wheels lock and the car skids for another 60 m. Determine the coefficient of kinetic friction between the wheels and the ice if the initial speed of the car was 40 km/hr.arrow_forward
- A person slides a bottle with mass 0.20 kg along a level table. It leaves his hand at 2.8 m/s and comes to a halt after going 1.0 m. Find the coefficient of kinetic friction between the bottle and the table.arrow_forwardA 2.5 kg block is initially at rest on a horizontal surface. A horizontal force F of magnitude 6.2 N and a vertical force P are then applied to the block. The coefficients of friction for the block and surface are us = 0.38 and uk = 0.22. (a) Determine the magnitude of the frictional force acting on the block if the magnitude of P is 8.0 N. (b) Determine the magnitude of the frictional force acting on the block if the magnitude of P is 10.0 N. (c) Determine the magnitude of the frictional force acting on the block if the magnitude of P is 12.0 N.arrow_forwardA 2.5 kg block is initially at rest on a horizontal surface. A horizontal force F of magnitude 5.7 N and a vertical force P are then applied to the block. The coefficients of friction for the block and surface are ls = 0.43 and lk = 0.24. (a) Determine the magnitude of the frictional force acting on the block if the magnitude of P is 8.0 N. (b) Determine the magnitude of the frictional force acting on the block if the magnitude of P is 10.0 N. N (c) Determine the magnitude of the frictional force acting on the block if the magnitude of P is 12.0 N. Narrow_forward
- The force acting on a particle has a magnitude of 166 N and is directed 29.4° above the positive x-axis. (a) Determine the x-component of the force. (b) Determine the y-component of the force.arrow_forwardA 6.53 kg block initially at rest is pulled to the right along a horizontal surface by a constant force of 125 N applied at an angle θ above the horizontal. The coefficient of kinetic friction between the block and the horizontal surface is 0.150. At what angle θ above the horizontal surface should the force be applied to achieve the largest possible speed after the block has moved 5.00 m to the right?arrow_forwardA particle of mass 0.5 kg is at rest on a rough plane inclined at an angle to the horizontal where sin = 3/5. The particle is just prevented fromsliding from the plane by a force of 2 N applied in an upward directionparallel to a line of the greatest slope of the plane.(a) Draw a figure showing all the forces acting on the particle. (b) Calculate the coefficient of friction between the particle and theplane.(c) Calculate by how much the force of 2 N must be increased so thatthe particle is about to move up the plane.arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Physics for Scientists and Engineers: Foundations...PhysicsISBN:9781133939146Author:Katz, Debora M.Publisher:Cengage Learning
Principles of Physics: A Calculus-Based TextPhysicsISBN:9781133104261Author:Raymond A. Serway, John W. JewettPublisher:Cengage Learning
Physics for Scientists and Engineers: Foundations...
Physics
ISBN:9781133939146
Author:Katz, Debora M.
Publisher:Cengage Learning
Principles of Physics: A Calculus-Based Text
Physics
ISBN:9781133104261
Author:Raymond A. Serway, John W. Jewett
Publisher:Cengage Learning
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