Question

which has greater effect on the kinetic energy of an object:
doubling the mass or doubling the velocity

Answer 1

i think doubling the mass will have greater effect on kinetic energy.......

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Answer 2

$<b><i>Kinetic Energy$

$E_{k} = \frac{1}{2}mv^{2}$

$E_{k}$ is directly proportional to the mass $m$

while
$E_{k}$ is directly proportional to the square of velocity $v^{2}$

So Doubling the velocity has greater effect( as it is squared) than the effect of Doubling mass

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