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(C) According to the equation of motion under gravity, the time taken $t$ to fall from a height $h$ is given by $h = \frac{1}{2}gt^2$, which implies $

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Both will reach the earth's surface simultaneously.

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(C) According to the equation of motion under gravity, the time taken $t$ to fall from a height $h$ is given by $h = \frac{1}{2}gt^2$, which implies $t = \sqrt{\frac{2h}{g}}$.Since the air friction is negligible, the motion of the objects depends only on the acceleration due to gravity $g$ and the height $h$.Both balls have the same size and mass, and since air resistance is ignored, the material properties (insulating vs. metallic) do not affect the acceleration of the objects.Therefore, both balls will experience the same acceleration $g$ and will reach the earth's surface at the same time.Thus, the correct statement is that both will reach the earth's surface simultaneously.

$A$ spherical insulating ball and a spherical metallic ball of the same size and mass are dropped from the same height. Choose the correct statement out of the following: {Assume negligible air friction}

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