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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 in the ratio of

A

`sqrt2 : 1`

B

`1 : 4`

C

`1 : 2`

D

`1 : sqrt2`

Text Solution

Verified by Experts

The correct Answer is:
C
V = constant
`K=1/2 mv^2 implies K prop m implies K_1/K_2 =m_1/m_2 =2/4`
`implies K_1/K_2 =1:2`
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