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

[Jack Uretsky <jlu@hep.anl.gov>]

Suppose  I answer "yes it did, and the energy of the block increased as a 
result."  How would you contradict this answer?
			Regards,
				Jack


On Wed, 14 Mar 2007, LaMontagne, Bob wrote:

> A crate sits on the bed of a flat-bed truck. The truck is initially at
> rest and then moderately accelerates. The crate does not slide, but
> simply follows the motion of the truck. Did the force of static friction
> that accelerates the crate do any work?
>
> I ask this because when a block is decelerated by kinetic friction, the
> KE of the block decreases and the internal energy of the surfaces
> involved increases. What is the energy transfer (or whatever your
> favorite terminology) mechanism for the static friction example above?
>
> Bob at PC
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