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Re: positive and negative work

At 08:42 AM 11/8/01 -0500, Justin Parke wrote:

"Discuss whether any work is being done by each of the following agents and,
if so, whether the work is positive or negative:

d) the leg muscles of a person in the act of sitting down."
....
The answer in the book is positive, with no explanation given.

Could someone explain this for me?

The book is wrong. The work done _by_ the muscles is negative. (The work
done _on_ the muscles would be positive, but that's not the question that
was asked.)