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

`1: 4`

`1: 2`

`1:sqrt2`

`sqrt2:1`

Text Solution

Verified by Experts

The correct Answer is:

Here `V_1=V_2 =sqrt(2gh)`
`(KE_1)/(KE_2)=(1/2m_1v_1^2)/(m_2v_2^2)=m_1/m_2=2/4=1/2`

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