A woman stands on an airport's moving sidewalk and moves due west at constant velocity. The frictional
Question:
A woman stands on an airport's moving sidewalk and moves due west at constant velocity. The frictional force on the woman is _____. (Ignore air resistance.)
(a) Zero
(b) Kinetic and to the west
(c) Kinetic and to the east
(d) Static and to the west
(e) Static and to the east
Step by Step Answer:
a Zero Explanation The frictional force on the woman ...View the full answer
College Physics With An Integrated Approach To Forces And Kinematics
ISBN: 978-1260547719
5th Edition
Authors: Alan Giambattista
Related Video
Static friction and kinetic friction are two types of friction that occur when two objects are in contact with each other. Static friction is the force that must be overcome to initiate motion between two surfaces that are in contact with each other but are not moving relative to each other. It is caused by the interlocking of rough surfaces at the microscopic level, and it increases as the force pushing the surfaces together increases. Once motion between the surfaces starts, the static friction is no longer present. Kinetic friction, also known as sliding friction, is the force that opposes the motion of two surfaces that are in contact with each other and are moving relative to each other. It is caused by the rubbing of the surfaces against each other and the resistance of the molecules in the surfaces to being moved. Kinetic friction is generally less than static friction, but it can still be a significant force, especially at high speeds. Both static and kinetic friction can be quantified using a coefficient of friction, which is a dimensionless number that represents the ratio of the frictional force between two surfaces to the normal force (the force perpendicular to the surfaces). The coefficient of static friction is typically greater than the coefficient of kinetic friction for a given pair of surfaces, because it takes more force to overcome the interlocking of the surfaces at rest than to maintain motion once it has started.
Students also viewed these Sciences questions
-
A woman stands on a scale in a moving elevator. Her mass is 60.0 kg, and the combined mass of the elevator and scale is an additional 815 kg. Starting from rest, the elevator accelerates upward....
-
X was issued 500 shares of ABC Ltd. at RS.12 including Rs.2 premium. He paid only application money of Rs.3 and failed to pay the allotment money of Rs.4 including premium. Consequently his shares...
-
A 56-kg woman stands at C on the vintage step stool shown. Half the womans weight is carried by the legs shown. The bottoms of the legs are not quite parallel to the floors so that bearing can occur...
-
Misty Cumbie worked as a waitress at the Vita Caf in Portland, Oregon. The caf was owned and operated by Woody Woo, Inc. Woody Woo paid its servers an hourly wage that was higher than the states...
-
Suppose that the demand curve for a good is represented by the straight line P = 10 - Q a. Draw a graph containing both the demand curve and marginal revenue curve. b. Is the marginal revenue curve a...
-
Describe the major elements and issues with parallel development.
-
Consider the following dataset Fit a regression line using the method of least squares. Determine \(r, b_{1}\), and \(b_{0}\). i 1 xi 23 2 Yi 26 -6 3 7. 91 4 6
-
On August 1, 2010, Cheryl Newsome established Titus Realty, which completed the following transactions during the month: a. Cheryl Newsome transferred cash from a personal bank account to an account...
-
During 2025, Tranquil Waters Spa reported revenue of $45,000. Total expenses for the year were $27,000. Tranquil Waters Spa ended the year with total assets of $32,000, and it owed debts totaling...
-
Shawn and Amy were college sweethearts and had been married for 20 wonderful years. They lived in Denver, Colorado. Shawn was one of three partners with the OMG! Engineering firm. Unfortunately,...
-
A child (weight W) sits on a level floor. The normal force on the child is_____. For each situation, how does the magnitude of the normal force N compare with the object's weight W? Answer choices:...
-
You place two different coins on the cover of your physics book and then slowly lift the cover. Assuming the coefficients of static friction are the same, which is true? (a) The more massive coin...
-
What is the distinction between endogenous variables and exogenous variables in economic models?
-
Debate the issues relating to across-the-board labor cuts versus cuts predicated on labor standards. What are the pros and cons of each method? Which is preferable?
-
Research other codes of ethics from three different organizations. List any common values sited in these codes. Note any differences between organizations and comment on why you think the unique...
-
Approximately 70 percent of all businesses are sole proprietorships. Why is sole proprietorship a popular form of business ownership? What are the circumstances when it might be important to consider...
-
Discuss the ways physicians and their practice behaviors affect the financial results of an operating budget and a capital budget.
-
The controlling function of management is best described as a. keeping employees in line. b. watching employees carefully by monitoring their e-mail and phone usage. c. measuring the firms...
-
A body has a mass of 12.6 kg and a speed of 0.87c. (a) What is the magnitude of its momentum? (b) If a constant force of 424.6 N acts in the direction opposite to the body's motion, how long must the...
-
Experiment: Tossing four coins Event: Getting three heads Identify the sample space of the probability experiment and determine the number of outcomes in the event. Draw a tree diagram when...
-
You have been employed by the local circus to plan their human cannonball performance. For this act, a spring-loaded cannon will shoot a human projectile, the Great Flyinski, across the big top to a...
-
A cannonball is catapulted toward a castle. The cannonball's velocity when it leaves the catapult is 40 m/s at an angle of 37with respect to the horizontal and the cannonball is 7.0 m above the...
-
After being assaulted by flying cannonballs, the knights on the castle walls (12 m above the ground) respond by propelling flaming pitch balls at their assailants. One ball lands on the ground at a...
-
Company defaulted on a $160,000 loan that was due on December 31, 2024. The bank has agreed to allow Lowlife to repay the $160,000 by making a series of equal annual payments beginning on December...
-
Cordell Incorporated experienced the following events in Year 1, its first year of operation: 1. Received $52,000 cash from the issue of common stock. 2. Performed services on account for $80,000. 3....
-
Which routing criteria is most commonly used? What units does it use?
Study smarter with the SolutionInn App