A ball of mass2 kg and another of mass 4...

A ball of mass`2 kg` and another of mass `4 kg` are dropped together from a `60` feet tall building . After a fall of `30` feet each towards earth , their respective kinetic energies will be the ratio of

`sqrt2 : 1`

1 : 4

1 : 2

`1 : sqrt2`

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