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Determining Static Friction Coefficient
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by Death Kamehameha
on 2008-08-29 08:28:57
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Hey peeps.. Itz me again.. Thanks for the help you guys gave me during the egg project thingy.. Now I have a new project. Design 2 experiments which will allow you to determine the static friction coefficient between a physics book (Haliday & Resnick, Walker, Fundamentals of Physics) and a small wooden block.. Any clue how to do it?? I have some ideas in mind but I'm not sure whether it's relevant or correct.. Zzz... So sleepy.. Stayed in University till 10pm..
-Keough- |ãŸã„ れㄠãょã†|
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Re: Determining Static Friction Coefficient
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by
on 2008-08-29 16:38:44 |
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1. place the book half way over the edge of a table 2. place the block on top of the book 3. tilt the book slowly until the block slides off and record the angle 4. calculate the friction coefficient step 4 is the hard part. give it some thought and i will help if you get stuck 
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Re: Determining Static Friction Coefficient
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by Death Kamehameha
on 2008-08-30 08:05:39
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Err... So how about another way???? LoL! I hought of the same thing.. The problem is the second experiment... I need to design 2..
-Keough- |ãŸã„ れㄠãょã†|
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Re: Determining Static Friction Coefficient
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by SuicidopoliS
on 2008-08-31 01:53:41 (edited 2008-08-31 01:55:11)
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Maybe this is gonna sound a bit stupid, but if you have a torque meter, you could just put the block on top of the book, attach the meter to it, pull (or push, depending on the type of meter you have) gently while steadily increasing the applied force, and record the force at which the block starts moving. Calculating the friction from there shouldn't be too hard... And that's a pretty direct way of doing it. .oO° Life's THE CURE, the rest are details! °Oo. |
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Re: Determining Static Friction Coefficient
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by Death Kamehameha
on 2008-09-02 00:04:29
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LoL! That's another good idea but the thing is, I do not have a torque meter.. The only equipment I have is that spring meter which measures the weight, in Newtons of an object. By the way, the force that will be applied would be unable to be measured by the meter as it would be too small. Actually I have another question. How do you determine whether the book 'starts moving'.
-Keough- |ãŸã„ れㄠãょã†|
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Re: Determining Static Friction Coefficient
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by
on 2008-09-10 23:03:01 (edited 2008-09-10 23:04:43)
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well, first, you would have to measure their weight, then, place the block over the book. then you could use the spring meter to pull the book and measure the strenght needed to make the block start to move
I'm Kyoya Hibari.
 I'll Bite you to Death! Wao! DeviantArt |
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Re: Determining Static Friction Coefficient
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I'd go with the first response, they gave you an experimental form of solving the Coefficient of Static Friction, and if you think about it, also told you how to answer any question you come across. But look at it in a theoretical perspective (like how to answer a textbook question) What you need to know is the angle of incline in which the block begins to slide, the constant acceleration of gravity, the mass of the object on the incline. Find these and I'm sure you'll be able to figure out your coefficient of friction using some simple formula. |