a ball of mass 2kg and another of mass 4kg are dropped together from a 60 feet tall building.after a fall of 30 each feet towards earth,their respective kinetic energies will be in the ratio of
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Answer:
Explanation: according to work energy Theron
Uf+ Kf = Ui+ Ki
0 +Kf = mgh + 0
kf= 2*10*30=600
as previous
Kf"= 4*10*30 =1200
Kf /Kf"=600/1200 =1/2
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