b) GPE= mgh gpe= 10 x 50 x 4 gpe= 2000 JPFY p.12119a) 50 x 10= 500N
c) KE=0.5 x m x v2 0.5 x 50 x v2 25 x V2
Collins, p.91
b) KE= 0.5 x 35 x v2 10500= 0.5 x 35 x v2
v2 = 600 v = 24.5 m/s
c) Some of the energy is lost through friction
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