# Which falls faster?

If you drop two balls from somewhere really high, the same shape and size but one is heavier (lets say metal) and the other is lighter (lets say plastic). Which falls the fastest? And why?

Don't google it! I just want to see how many people know it :)

• Metal falls faster!
Vote A
• Plastic falls faster!
Vote B
• They fall the same speed!
Vote C
• My brain hurts >.<
Vote D
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Okay, so the answer is actually the metal one, but only by a tiny bit because of buoyancy. In a vacuum they would fall at the same speed. Many people think the metal will fall faster simply cause it has a bigger force pulling it down. Then there are many people who remember learning that they actually fall the same speed, because g=W/m=9.8m/s^2, the force is stronger but it needs more force to accelerate. But very few people seem to know that that's only in a vacuum and in air the heavy one does
fall faster. And out of those few people most think it's cause of air resistance, which doesn't matter because they're the same shape and size. So the real reason is buoyancy, it's what makes things float. And an easy way to see this is dropping a balloon full of air and a balloon full of water. Or a balloon full of helium works even better.
So thanks all for your responses :) Hope you learned something interesting :)

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• metal falls faster ' in air '

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• Why?

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• Lol that doesn't explain it. I've already posted the answer now anyway, I just wanted to see if he knew why things that weigh more fall faster in air

• Omar, The asker has already provided a beautiful explanation for the question, but if its tldr; for you, simply , we know that v=u+at , in case of gravity, v=u+gt
this expression is independent of m, (mass) that means velocity in free fall is independent of mass. This is true for ball and earth as system ( that means no air) , but when air is considered an upward buoyant force is excerted which is inversely propotional to mass. Hope you understand it and sorry if this sounded too nerdy.