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Re: [Phys-l] Work done by Static Friction



How embarrassing - that I not only mistake your dated question
for a current item - but then see your always polite response too....
:-)
Regards

Brian W



At 08:57 AM 3/29/2007, you wrote:
Thanks -- now I understand your method.

bc

Brian Whatcott wrote:

>At 08:06 PM 3/17/2007, you wrote:
>>And the torque at the road? -- how about a cog railway?
>>
>>bc


>If I instantiated a lever with fulcrum in a rail cog, bearing on a
> vehicle hub and activated by a force at some higher point.
>no modeler would see much of a problem with it, I don't suppose.
>
>But to answer the question: a force at the rail cog provides
> a torque to the Earth mass to my mind.
>


Brian Whatcott Altus OK Eureka!