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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
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- 1 : √2
- √2 : 1
- 1 : 4
- 1 : 2
Correct Option: D
Since height is same for both balls, their velocities on reaching the ground will be same
| ∴ | = | m1v02 | = | = | = | |||||
| 2 | ||||||||||
| K.E2 | m2v02 | m2 | 4 | 2 | ||||||
| 2 | ||||||||||
