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

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A body of mass

$5\ kg$ is thrown up vertically with K.E. of

$490\ joule$ . If the acceleration due to gravity is

$9.8\ ms^{-2}$ , then the height at which the K.E. of the body becomes

$half$ its original value is given by

$10\ m$
$12.5\ m$
$5\ m$
$50\ m$

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