Re: rolling

[Justin Parke <FIZIX29@AOL.COM>]

I just discovered that the latest edition of Halliday, Resnick, and Walker has the correct answers (i.e. .5 L and L) in the back of the book!

Justin

In a message dated 2/4/2004 8:11:12 AM Eastern Standard Time, FIZIX29@AOL.COM writes:

> > I need some help with the following question from Halliday et al (6th=
> > ed.),
> > ch. 12 question 5:
> >
> > "A woman rolls a cylindrical drum, by means of a board on top, throug=
> > h the
> > distance L/2, which is half the board's length.  The drum rolls smoot=
> > hly, and
> > the board does not slide over the drum.
> > a)  What length of board has rolled over the top of the drum?
> > b)  How far has the woman walked?"
> >
> > The answers in the book are L and 1.5 L.  I am not sure I understand =
> > what is
> > meant by "what length of board has rolled over the top of the drum." =
> > It seems
> > to me that it should be L/2.  If the questions means how
> far has the =
> > board
> > moved with respect to the ground then I agree it is L.
> >
> > Answers in algebraic form (plus verbal explanations) are
> > preferable t=
> > o
> > strictly verbal arguments.
> >
> > Justin

Justin Parke
Oakland Mills High School
Columbia, MD