Physics Lab Write-ups #13-15

Physics Lab Write-ups #13-15 - ConservationofEnergy:Pulleys...

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Conservation of Energy: Pulleys June 24, 2009 Questions 1) The measured values for both at rest and moving at constant speed were 50 g each. 2) The values above are both 50 g [the same] and are equivalent to half the mass of 100 g,  which is the weight of the hanging mass. 3) In order to raise the mass 20 cm, I would have to pull down 20 cm on the spring scale. 4) F = w x d   10 x 0.02 = 0.2 J is put into the pulley system. 5) 0.2 J is received out of the pulley system. 6) The values read on the spring scale don’t change when compared to the mass of the  object being held at rest or lifted. 7) In order to raise the mass 20 cm, the spring scale would have to be raised 40 cm, twice as  much. 8) The amount of work put into the pulley system would be 0.4 J, twice as much as the first  time. 9) The amount of work received out of the pulley system is 0.4 J. The Magic Can
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Physics Lab Write-ups #13-15 - ConservationofEnergy:Pulleys...

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