What's gravity

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spjennifer · 56-60, T

As someone who has flown in "negative g" aircraft, I can tell you that without a doubt, gravity exists. If you seriously doubt it, go to the tallest building where you live and step off of the roof, you'll very quickly find out that gravity does in fact exist.

TBIman · 41-45, M

@spjennifer Someone stepping off a roof is no proof of gravity. It is proof that if something weighs more than the air around it, it will fall.

spjennifer · 56-60, T

@TBIman Then why don't airplanes come crashing to the ground? They are much heavier than the air around them, no?