Insights Blog
-- Browse All Articles --
Physics Articles
Physics Tutorials
Physics Guides
Physics FAQ
Math Articles
Math Tutorials
Math Guides
Math FAQ
Education Articles
Education Guides
Bio/Chem Articles
Technology Guides
Computer Science Tutorials
Forums
Intro Physics Homework Help
Advanced Physics Homework Help
Precalculus Homework Help
Calculus Homework Help
Bio/Chem Homework Help
Engineering Homework Help
Trending
Featured Threads
Log in
Register
What's new
Search
Search
Search titles only
By:
Intro Physics Homework Help
Advanced Physics Homework Help
Precalculus Homework Help
Calculus Homework Help
Bio/Chem Homework Help
Engineering Homework Help
Menu
Log in
Register
Navigation
More options
Contact us
Close Menu
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Forums
Homework Help
Introductory Physics Homework Help
Is friction really always related to the normal force?
Reply to thread
Message
[QUOTE="Lnewqban, post: 6408745, member: 673625"] If we consider friction force as the resistance to relative movement between two surfaces in contact, the principle of proportionality applies the same to horizontal, inclined or vertical surfaces. Static μ is a proportionality coeficient between normal and resistive forces that is found experimentally for each couple of different materials. The value is more or less equal to the tangent of the maximum angle of a slope over which a block is resting without sliding. Your diagram shows an ideal situation in which the horizontal distances between pulley, rope point of attachment and center of mass of block respect to the vertical wall are exactly the same; therefore, there is no force pressing the block against the wall and vice-verse. Basically, it is like the two surfaces were not in contact at all. For any deviation of that ideal situation, you could have some perpendicular force between those two surfaces. Hence, the block will not move vertically at all until the resultant vertical force becomes greater than certain percentage (static μ) of the magnitude of that perpendicular force (N). After the relative movement is stablished, there will be a resistive force, of slightly smaller magnitude (dynamic μ * N) than the one previous to the movement. [/QUOTE]
Insert quotes…
Post reply
Forums
Homework Help
Introductory Physics Homework Help
Is friction really always related to the normal force?
Back
Top