A ball of mass 12 kg and another of mass...

A ball of mass `12 kg` and another of mass `6 kg` are dropped from a `60` feet tall building after a fall of `30` feet each towards earth, their kinetic energies will be in the ratio of .

`sqrt2:1`

`1:4`

`2:1`

`1:sqrt2`

Text Solution

Verified by Experts

The correct Answer is:

`KE =decrease in potential energy =mgh`
or `KE prop m`
or `(KE)_(1)/(KE)_(2) =(12)/(6) =2/1`.

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