Gravity pulling on objects
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Another question here.
2 items, 1 10kg, 1 9kg. I release them both at the same time in a vaccum. What will happen?
a) 10kg will hit ground 1st
b) 9 kg will hit ground 1st
c) both hit ground at the same time.
I am partly convinced its C.
potential energy = mgh
kinetic = 1/2 mv^2
In this case all potential energy is converted into kinetic energy therefore
mgh = 1/2mv^2
gh= 1/2v^2
therefore weight playes no role in the above scenario. Am I correct? -
I can tell you it has nothing to do with mgh, nor 1/2mv^2.
Just think what were they trying to prove with a coin and a feather falling in a vacuum. -
C...
forget the terms to explain... -
oh ya, was thinking of ditzy way also...Originally posted by ditzy:I can tell you it has nothing to do with mgh, nor 1/2mv^2. Just think what were they trying to prove with a coin and a feather falling in a vacuum. -
serious? lol then what is the theory of this phenomenal?Originally posted by ditzy:I can tell you it has nothing to do with mgh, nor 1/2mv^2. Just think what were they trying to prove with a coin and a feather falling in a vacuum. -
I think it's because there isn't air resistance.Originally posted by dibilo:serious? lol then what is the theory of this phenomenal? -
yup and? I mean if this cannot be proven by potential and kinetic energy equations, what evidence is there that can prove this works (besides doing repeated experiments)? Any formulas?
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in vacuum theres no air resistance. so only gravity acting.
so the larger object has more gravity acting on it, but being larger it is harder for it to accelerate. so like a basketball and a feather. the basketball say is 1000x the mass of feather. then it has 1000x gravity acting on feather, but it needs 1000x more force acting on it to accelerate it.
so the additional gravity acting on the basketball cancels out the additional force needed to accelerate the basketball compared to the feather. so in this case mass does not play a part. -
hmm sounds probable...source? lol where did you find this explaination?Originally posted by Deadly:in vacuum theres no air resistance. so only gravity acting.
so the larger object has more gravity acting on it, but being larger it is harder for it to accelerate. so like a basketball and a feather. the basketball say is 1000x the mass of feather. then it has 1000x gravity acting on feather, but it needs 1000x more force acting on it to accelerate it.
so the additional gravity acting on the basketball cancels out the additional force needed to accelerate the basketball compared to the feather. so in this case mass does not play a part. -
just go search coin and feather experiment. and basically this is basic physics in secondary school. cuz of greater mass, u have greater inertia, and thus an object which is heavier will require more force to accelerate it.Originally posted by dibilo:hmm sounds probable...source? lol where did you find this explaination?
check http://www.exploratorium.edu/snacks/falling_feather.html which is basically the same as what i just said -
You can see it by formula
initial energy = mgh
final energy = 1/2 mv^2
initial energy = final energy using conservation of energy
v^2 = 2gh => no mass involved -
Vacuum leh... secondary textbook will have the answer.
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yeah this is the answer, cuz they cancel each other out.Originally posted by eagle:You can see it by formula
initial energy = mgh
final energy = 1/2 mv^2
initial energy = final energy using conservation of energy
v^2 = 2gh => no mass involved -
Galileo proved this a few centuries ago.
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So many smokers gathering here.
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http://www.juliantrubin.com/bigten/galileofallingbodies.htmlOriginally posted by teraexa:Galileo proved this a few centuries ago.