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प्रश्न
A rocket is moving up with a velocity v. If the velocity of this rocket is suddenly tripled, what will be the ratio of two kinetic energies?
उत्तर
Let the mass of the rocket be m.
The kinetic energy of a rocket when it moves with velocity v,
`"K"_1 = 1/2"mv"^2`
The kinetic energy of rocket when it moves with velocity 3v,
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