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Factors Affecting Kinetic Energy

A rocket is m...

Question

A rocket is moving up with velocity "v". if the velocity of the rocket is tripled, what will be the ratio of two kinectic energies??

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Solution

Let, m be the mass of rocket.
Initial kinetic energy is, KE_i = ½ mv²
Final kinetic energy is, KE_f = ½ m(3v)² = 9 KE_i
Therefore, KE_i : KE_f = 1 : 9

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