Question from our Lab today on Friction

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The discussion revolves around understanding the coefficient of rolling friction for a car on an inclined plane moving at constant speed, expressed as mu = tan(theta) - m2/mc cos(theta). Participants express confusion about the problem and seek clarification on the variables involved, particularly m2 and mc. There is a consensus that the explanation of rolling friction in academic settings could be improved. The conversation emphasizes the need for clearer definitions and guidance to help students grasp the concepts better. Overall, the thread highlights the challenges students face in understanding complex physics problems.
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Homework Statement


Assuming that f=mu(N), show that the cofficient of (rolling) friction for the
car moving down the inclined plane with a constant speed is given by
mu=tan(theta) - m2/mc cos(theta)(Use symbols, not numbers.)


Homework Equations





The Attempt at a Solution


Can someone explain any of this so I can understand what they are asking.
I can't get started because I don't really understand it.
Thanks,
Kevin
 
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Hi Kevin! :smile:

(have a mu: µ and a theta: θ :wink:)
Husker70 said:
Assuming that f=mu(N), show that the cofficient of (rolling) friction for the
car moving down the inclined plane with a constant speed is given by
mu=tan(theta) - m2/mc cos(theta)(Use symbols, not numbers.)
…
Can someone explain any of this so I can understand what they are asking.
I can't get started because I don't really understand it.

hmm … fair point! :biggrin:

I wish professors would explain rolling more carefully. :rolleyes:

Before I go any further, can you say what m2 and mc are (I can guess what θ is :wink:), and show us a bit more of the question? :smile:
 
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