Physics Laboratory Manual
4th Edition
ISBN: 9781133950639
Author: David Loyd
Publisher: Cengage Learning
expand_more
expand_more
format_list_bulleted
Concept explainers
Textbook Question
Chapter 7, Problem 1PLA
For kinetic friction the direction of the frictional force on a given object is always opposite the direction of that object’s motion. (a) true (b) false
Expert Solution & Answer
To determine
Whether the statement is true or false.
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 k. Determine the angle α, at which the force acting to the body and causing its movement is the least.
To avoid a collision while traveling at a speed of 19 m/sec and descending a steep mountain pass with a grade of 4.3%, a truck locks up all wheels and skids to a stop over a distance of 90 meters. Determine the coefficient of friction between the truck tires and pavement.
Chapter 7 Solutions
Physics Laboratory Manual
Ch. 7 - For kinetic friction the direction of the...Ch. 7 - The two coefficients of friction discussed in this...Ch. 7 - Suppose a block of mass 25.0 kg rests on a...Ch. 7 - To measure the coefficient of kinetic friction by...Ch. 7 - A 5.00 kg block rests on a horizontal plane. A...Ch. 7 - Both types of coefficient of friction are...Ch. 7 - 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 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_forwardA 100-kg block is moved at a constant speed along the horizontal surface by a force inclined above the horizontal. The horizontal force is 400 newtons, while the vertical component of the force is 300 newtons. Find (a) the force of kinetic friction, (b) the normal force and the (c) coefficient of kinetic friction.arrow_forwardIn a pickup game of dorm shuffleboard, students crazed by final exams use a broom to propel a calculus book along the dorm hallway. If the 2.4 kg book is pushed from rest through a distance of 0.74 m by the horizontal 18 N force from the broom and then has a speed of 2.0 m/s, what is the coefficient of kinetic friction between the book and floor?arrow_forward
- 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.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_forwardWhile coasting a level section of the track, the speed of a 750kg bobsled decreases from 35m/s to 30m/s over a distance of 100m. Find the coefficient of kinetic friction between the bobsled and the icy track.arrow_forward
- An object of mass 3 kg moves towards the negative x axis with a constant speed of 8 m/s and the coefficient of kinetic friction of the object with the ground is 0.39, so the value of the net force on the box is:arrow_forward(b) The coefficient of kinetic friction between a 40 kg crate and the ware- house floor is 70% of the corresponding coefficient of static friction. The crate falls off a forklift that is moving at 3 m/s and then slides along the warehouse floor for a distance of 2.5 m before coming to rest. What is the coefficient of static friction between the crate and the floor?arrow_forwardA 3.5 kg block is pushed along a horizontal floor by a force of magnitude 15 N at an angle 40 with the horizontal . The coefficient of kinetic friction between the block and the floor is 0.25. Calculate the magnitudes of (a) the frictional force on the block from the floor and (b) the block’s acceleration.arrow_forward
- A 7.3 kg crate is moved rightward across a horizontal surface by a horizontal force such that it has constant velocity. If the coefficient of the kinetic friction is 0.58, calculate the magnitude of the kinetic friction force.arrow_forwarda 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_forwardDuring the investigation of a traffic accident, police find skid marks 150.0 m long. They determine the coefficient of friction between the car's tires and the roadway to be 0.500 for the prevailing conditions. Estimate the speed of the car when the brakes were applied.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
Physics for Scientists and Engineers: Foundations...
Physics
ISBN:9781133939146
Author:Katz, Debora M.
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