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(6th=I need some help with the following question from Halliday et al
ch. 12 question 5:
"A woman rolls a cylindrical drum, by means of a board on top,
distance L/2, which is half the board's length. The drum rolls
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
meant by "what length of board has rolled over the top of the drum."
It seemsfar has the =
to me that it should be L/2. If the questions means how
moved with respect to the ground then I agree it is L.
Answers in algebraic form (plus verbal explanations) are
strictly verbal arguments.