Re: Conservation of ME and nonconservative forces

["lorinda.stinnett" <stinn001@BAMA.UA.EDU>]

On Tue, 26 Jun 2001, QUIST, OREN wrote:

> Friction does no work in this case because there is no slipping.  That is,
> there is a force but no displacement of the contact point.
I agree with you.
My problem is that the displacement defined in work was not limited to the
point of contact.  For instance: If a box is pushed across the floor is
the work done only to the part of the box that is in contact with the hand
pushing it, or is the work done on the entire box?

> The problem is easily done using torques and Newton's Laws and the same
> answer is achieved.
Agreed!

> Oren Quist, SDSU
-Lorinda Stinnett