NCERT Exemplar VI — task. Science CBSE, Class 9.

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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

If a body of mass \(m\) is moving with a speed \(v\), then its Kinetic Energy \({E_k}\) is given by the expression,

\(E_k\ =\ \frac{m}{v^2}\)
\(E_k\ =\ \frac{1}{2}\ m \times v\)
\(E_k\ =\ \frac{1}{2}\ m \times v^2\)
\(E_k\ =\ m \times v^2\)

Ratio of two kinetic energies \(=\) \(:\)

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