Multiple choice question XLVI — task. Science CBSE, Class 9.

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A \(1\ kg\) mass has a kinetic energy of \(1\ joule\) when its speed is

\(0.45\ ms^{-1}\)
\(1\ ms^{-1}\)
\(1.4\ ms^{-1}\)
\(4.4\ ms^{-1}\)

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