Yes- Fiery Furnaces!

:)

During the data analysis, it was assumed that the rope itself was massless. In reality, the rope has a small mass, but for the sake of simplicity, this mass was ignored. If the mass of the entire system, including the rope, had been considered, the value for m used in the equation for conservation of energy would have to be increased. Consequently, the expected value for h4 would be less than the value calculated during the data analysis, and the expected value for h would be greater than calculated. This consideration would increase the difference between the measured and expected h, but considering the other sources of error noted, they may balance out. Also, the “equilibrium position” (h2) will have to be moved up a bit. This has an impact on Ee calculation. This hypothesis can be verified rather easily - just measure the mass of rubber bands (similar material is fine) and compare that to the mass of the Barbie.

bill