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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