Answered: As a girl pushes an object across a…

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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Question

As a girl pushes an object across a wood floor, she suddenly comes to an area where the floor has been waxed recently, making it slippery. What becomes true of the coefficient of kinetic friction? A. The coefficient of kinetic friction increases. B. The coefficient of kinetic friction decreases. C. The coefficient of kinetic friction becomes zero. D. The coefficient of kinetic friction becomes negative.

Expert Solution

Step 1

In order to resolve the above problem, the concept of kinetic friction is used. When an object undergo sliding motion over any surface, then the surface tend to exert some force to resist the sliding motion of object. This resisting force is known as kinetic frictional force.

Its mathematical expression is given as,

$f_{k} = μ_{k} N$

Here,

$f_{k}$ is the kinetic frictional force.

$μ_{k}$ is coefficient of kinetic friction.

N is the normal force.

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