physics experiment

by Fex • 11 Oct 2008, 09:42 • Journals
Good morning pimps

I need some help to survive at school! In a group of 2 we have to talk about a physics experiment (it can be really easy one, for example: you drop a tennis ball, football, .. and you check which one bounces the highest) and we have to talk a bit about the results.
Since I've got a lack of inspiration I need you! Do you maybe know an easy experiment where I can get enough results and stuff from?!

help pl0x

Yours sincerely,
die FexZmeister
Comments
26
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b0nes37 11 Oct 2008, 10:44
You can try measuring how much weight a spring of various metals can take before it permantly changes shape or/and until it snaps
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Fex 11 Oct 2008, 10:49
hmm, not bad, will think about it :)
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mant 11 Oct 2008, 11:04
how many punches can an average man take before dropping to the floor
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Fex 11 Oct 2008, 11:05
if you get me enough volunteers I'd be glad to try this one :D
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mant 11 Oct 2008, 11:08
well you can always try how much can you masturbate in 1 hour :D
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Fex 11 Oct 2008, 11:10
the prob (ZOMG I MEAN SOLUTION) is that my partner is a girl ^_^
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gari 11 Oct 2008, 11:14
in vacuum, what drops faster: bowling ball or a feather.
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Xo 11 Oct 2008, 12:08
You're great! Galilei salutes you!
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gari 11 Oct 2008, 12:58
hope so :D
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Krato 11 Oct 2008, 12:42
the same speed right? :D
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loazis 11 Oct 2008, 13:20
does the feather fall as fast as the bowling ball normally does or does the bowling fall as fast as a normal feather does? :P

or something in between? :D
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gari 11 Oct 2008, 13:38
both are falling exactly with the same speed.
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loazis 11 Oct 2008, 13:44
Yes I know, but since the bowling ball normally falls faster than the feather (normally being in a non-vacuum space), do they both alter their speed or does the feather fall down like a bowling ball in normal circumstances?
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gari 11 Oct 2008, 14:15
thats the magical question! i have no fucking clue :DDD

i think the bowling ball lowers his speed to the same of the rising speed of the feather so they got an middlespeed of both (imo) :s
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wipeout 11 Oct 2008, 17:55
both will be faster, no air drag
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gari 11 Oct 2008, 18:23
but than the feather hast to be more faster than the bowling ball?
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wipeout 11 Oct 2008, 21:10
yes, the feather in the vacuum will be faster than the bowling ball in air (with drag).

in the vacuum:
both have different potential energies Epot = m*g*h (different mass)
due to energy conservation the potential energy (when being dropped) equals the kinetic energy before hitting the ground: Epot = Ekin with Ekin = 1/2*m*v²
<=> v² = 2*g*h
as you can see the mass doesn't matter

in air:
again both have a potential energy Epot
but now we have air drag Fdrag = 1/2*cw*A*rho*v²
again energy conservation: Epot = Ekin + Edrag
thus the maximum speed will be lower
[there's a so called terminal velocity: Fg = Fdrag
=> m*g = 1/2*rho*cw*A*v²
<=> v² = 2*m*g/(rho*cw*A)]
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gari 11 Oct 2008, 21:36
in vacuum the mass never matters
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nuNca 11 Oct 2008, 11:24
try "de wiskundige slinger"
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madi 11 Oct 2008, 11:46
build a MOT and try to catch an Bose Einstein Condensate :D
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cryptz 11 Oct 2008, 11:54
ask sock
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loazis 11 Oct 2008, 13:20
Well, you could drop a tennis ball, football, .. and then check which one bounces the highest
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xeo 11 Oct 2008, 13:26
Google is your friend:
gg:easy physics experiment

For example, 1 google result:
http://scifun.chem.wisc.edu/wop/Reaction.html

;)

PS: Also you can try this typical youtube experiment :) :
http://es.youtube.com/watch?v=AE3dRBlQjTE
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