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November 01, 2025, 03:15:17 pm
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Author Topic: Dynamics question  (Read 624 times)  Share 

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tazza

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Dynamics question
« on: September 17, 2011, 03:16:32 pm »
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What is the least force parallel to the incline, which will pull a body of mass 100 KG up an incline of 30 degrees if the coefficient of friction is 02???

I know this is an easy question, but the limiting equilibrium/frictional questions are the only ones I can't get my head around completely. Any help would be appreciated.
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DannyN

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Re: Dynamics question
« Reply #1 on: September 18, 2011, 10:43:26 am »
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umm here is how i would do this question :P

since they've given you the coefficient of friction, you are then able to find maximum friction. (i believe you meant 0.2)?

F-fricmax=UR
--> 0.2[100cos(30)]=17.32N
therefore if the force is greater than maximum friction then it will be able to move the mass
so a force >17.32

hope this helps and hopefully i didnt make an error
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2010: Mathematical Methods (CAS)
2011: English | Specialist Mathematics | Physics | Chemistry | Further Mathematics
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