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Re: rolling

I performed this expermiment using a meterstick for the board and a bicycle wheel for the drum. The initial condition of the meterstick was the 0 cm mark directly over the hub of the wheel. When the wheel rolled 50 cm along the ground the 50 cm mark of the meterstick was directly over the hub of the wheel. Thus the meterstick moved 50 cm + 50 cm = 1 m = L along the ground. What am I missing? (By the way I supported the same end the whole time)


In a message dated 2/4/2004 1:39:24 PM Eastern Standard Time, betwys1@SBCGLOBAL.NET writes:

If the drum moves L/2 wrt the ground,
and the board moves 3/2L wrt the ground,
how far does the board move with respect to the drum's top?
3/2L - L/2 = L

Justin Parke
Oakland Mills High School
Columbia, MD