In a vacuum, a coin and a feather fall equally, side by side. Would it be correct to say that equal forces of gravity act on both the coin and the feather when in a vacuum?
Question 3.S&C.3: In a vacuum, a coin and a feather fall equally, side by side...
No, no, no—a thousand times no! These objects accelerate equally not because the forces of gravity on them are equal, but because the ratios of their weights to masses are equal. Although air resistance is not present in a vacuum, gravity is. (You’d know this if you placed your hand into a vacuum chamber and a cement truck rolled over it!) If you answered yes to this question, let this be a signal to be more careful when you think physics
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