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Wednesday, September 14, 2011

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PFY pg 121

19a) w=50x10
w= 500N

b) GPE = MGH
GPE = 50x10x4 GPE = 2,000J

c) KE= 2,000J

Collins pg 91 3a) GPE = 35x10x30 GPE = 10,500J

b) GPE at the top = KE at the bottom 10 500 = 0.5x 35x v squared v squared = 600 v= 24.5m/s c) SOme energy is wasted due to friction

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