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Hard Question

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Parkboy
Posts: 2303 - Karma: 32
Maybe someone can help me out here. Which will roll down an incline faster, a can of water or a can of ice? Defend your answer.




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Nov 22 2004 11:34PM
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PowderCanuck
Posts: 2626 - Karma: 10
do you know what the sad part is? if any of us were coming fresh out of physics 11 or 12, we'd be able to answer the question without even thinking about it... just goes to show how much you remember



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Screw this I'm going skiing
Nov 26 2004 12:49AM
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Kevo
Posts: 2374 - Karma: 136
Yeah I forget what the thing is called that determines that...something like 'moment of inertia' but FOR SURE THE ICE will roll faster. My physics teacher did this experiment with a can of soup and a can of pasta and they both weighed the same. Anyway, the solid object always rolls faster.
Nov 26 2004 1:45AM
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public-enemy#1
Posts: 1277 - Karma: 10
yeah i'm fresh out of phys 12....not a hard question afterall
Nov 26 2004 4:06AM
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jack_tha_ripper
Posts: 2057 - Karma: 11
this isnt really a hard answer, u dont even have to get into all that advanced crap.
basiclly the water sloshing around inside the can while it was rolling would distrupt the weight and slow it down and at certain times speed it up, but the water moving wud probab;y put the can of course and the water would completely screw around with everything because it cud go anywhere and slow down then speed up. but with the ice it is basiclly one whole solid object with an even mass inside it, so it would roll at an even pace without oing off course at all and it would build up speed at a steady rate for as long as it was rolling, while the can with the water wouldnt
Nov 26 2004 4:27AM
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GhostfaceKillah
Posts: 3398 - Karma: 10
my friend once put a beer bottle in the freezer and it broke
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Member # 2038
Nov 26 2004 6:34AM
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sherLocke
Posts: 4701 - Karma: 8
the fucking water doesnt slosh its completely filled with water, no air. you need air space to slosh, stop saying that because it has nothing to do with the answer. and yeah i didnt mean that mass had no effect because obviously it does but i felt that the mass was so negligable in this situation that you didn't really have to look at it.





'I thought i was going to dead.'

-Charles Gagnier
Nov 27 2004 9:24AM
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Parkboy
Posts: 2303 - Karma: 32
For those of you that wanted to know the answer was........water. Why? I can't remember, he started to explain it but I was busy drawing terrain parks in my notebook.




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Dec 13 2004 12:29AM
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Apple
Posts: 7906 - Karma: 33
water? now i want to know why...
-Thom Savery

please pardon the cacography

--->CCR*

'I hope you get hit by a neon'

'just make sure all the Jewish kids have rides'

Dec 13 2004 12:40AM
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Boards
Posts: 849 - Karma: 27
and JD, well everyone, the volumetric expansion of water to ice is 9-11% so you could figure out how much water you would need to fill the jar without breaking it.

the water makes sense as was stated in a few answers. the friction of the water on the jar is too low to consider. and we should have asked what level of physics this is, kuz if it is high school, would we even need to consider the friction in the jar?
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Dec 13 2004 1:25AM
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eastcoast_skier_1080
Posts: 64 - Karma: 10
In that calss and the ice one would rool faster because the ice would not move in the can and the weight would not matter because of galaeos experments they would bolth have the same termanal velocity
Dec 13 2004 10:10AM
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martockpublicenemy
Posts: 2284 - Karma: 11
a can of ice becuaes it solid, but watwer and ice are the same weight

lets go skiing
Dec 13 2004 12:53PM
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Apple
Posts: 7906 - Karma: 33
^ and^^ are dumb.. he already said the right answer acording to his teacher was water. but way to pay atention.
-Thom Savery

please pardon the cacography

--->CCR*

'I hope you get hit by a neon'

'just make sure all the Jewish kids have rides'

Dec 13 2004 12:58PM
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sherLocke
Posts: 4701 - Karma: 8
i went and asked my physics teacher and he agreed with me one hundred percent on the ice. so who the hell knows.





'I thought i was going to dead.'

-Charles Gagnier
Dec 13 2004 8:04PM
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rhcp
Posts: 2598 - Karma: 18
ok, theres only one way to settle this: by catapult. One member of each side of the argument will be strapped in and thrown off a mountainside. whoever survives wins the argument for his side. if they both survive, repeat for as long as necessary. if they both die, find more people on each side to launch until the winner is determined.
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Dec 13 2004 8:30PM
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Apple
Posts: 7906 - Karma: 33
you know, more arguments and debats should be solved that way..
-Thom Savery

please pardon the cacography

--->CCR*

'I hope you get hit by a neon'

'just make sure all the Jewish kids have rides'

Dec 13 2004 9:10PM
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ilovehead
Posts: 586 - Karma: 6
Alright thom... whatever you say thom...
Dec 13 2004 9:44PM
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public-enemy#1
Posts: 1277 - Karma: 10
no its not water dude! its ice! U, ME, CATAPULT NOW!
Dec 15 2004 12:17AM
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Apple
Posts: 7906 - Karma: 33
i think that we need another physics teacher in on this. So far its one teacher ice and one teacher water. We need a tiebreaker, or two. everyone in highschool go ask a physics teacher and tell us what they say.
-Thom Savery

please pardon the cacography



--->CCR*

'I hope you get hit by a neon'

'just make sure all the Jewish kids have rides'

'naahhmahhnahhhahhh ... i mean ... the weekend of monday'
Dec 15 2004 12:19AM
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Boards
Posts: 849 - Karma: 27
then someone in university physics figure this shit out, you are atleast as smart a s a high school physics teacher.
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Dec 15 2004 11:22AM
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Lanemeyers
Posts: 5007 - Karma: 19
The can of ice would expand and bulge at the sides. Therefore, the can of ice would have less points of resistance, therefore, less friction. I built two cub cars this morning. One with ice wheels, and one with water wheels. The cub car with ice wheels was able to shoot Blueberry Gap and make it past Jimmy's S-Turn. The water wheels one, hardly able to make turn #3 was forced to back out after problems in the pitstop. So if it's based on actually applying the theories to Cub Car Construction 101, in which, I'm quite sure I am the expert here, well, then, the answer is obvious: Xmas Preve is only 8 days away, not counting today!

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Viva La Resistance!
Dec 15 2004 12:47PM
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ilovehead
Posts: 586 - Karma: 6
... i didn't know you could shape water into wheels
Dec 16 2004 2:27PM
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sherLocke
Posts: 4701 - Karma: 8
i think he meant water filled wheels. and cub car dude i think we had to assume that there were equal volumes of water and ice and not neccesarily equal masses so there is no bulge.





'I thought i was going to dead.'

-Charles Gagnier
Dec 16 2004 7:39PM
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BillyMFBadass
Posts: 576 - Karma: 10
wouldnt they go at the smae speed cuz of gravity and all that?
Dec 16 2004 7:42PM
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evilninja
Posts: 1069 - Karma: 10
water... it has more inertia.

-Baybe, I ain't no hero.I'm just a

smoothe pimped-out playa from tha streets who knows how to get his.
Dec 16 2004 7:44PM
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1080ski
Posts: 4424 - Karma: 191
does the water have more inertia than ice?
Dec 16 2004 7:45PM
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1080ski
Posts: 4424 - Karma: 191
^^i didnt see that, it hink your right and the ice will go faster
Dec 16 2004 7:46PM
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sherLocke
Posts: 4701 - Karma: 8
yeah water has more inertia but because the barrels are obviously going to roll the water's inertia won't be effective until it catches up with the rmp's of the barrel. so now on second thought if the hill was super fuckin long i guess the water could win. but if the hill was of relatively normal length the ice would win.





'I thought i was going to dead.'

-Charles Gagnier
Dec 16 2004 7:46PM
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BillyMFBadass
Posts: 576 - Karma: 10
kinda like when u drop a rock and a tennis ball at the same time from the same highet they both reach the earth at the same time
Dec 16 2004 7:47PM
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1080ski
Posts: 4424 - Karma: 191
^thanks.... haha but its that somebody elses avvy?
Dec 16 2004 7:49PM
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1080ski
Posts: 4424 - Karma: 191
ya thats snapjibbers avvy
Dec 16 2004 7:51PM
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BillyMFBadass
Posts: 576 - Karma: 10
dunno didnt wanna waste the time to read em all
Dec 16 2004 7:52PM
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evilninja
Posts: 1069 - Karma: 10
the centrifical force of the water is what'll do it.

-Baybe, I ain't no hero.I'm just a

smoothe pimped-out playa from tha streets who knows how to get his.
Dec 16 2004 7:52PM
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sherLocke
Posts: 4701 - Karma: 8
its centripetal bud and that has nothing to do with it. and to the dude who keeps referring to gravity that only happens in a vacuum and in free fall. we are talking about rolling down a hill. its a very different thing here theres many other factors.





'I thought i was going to dead.'

-Charles Gagnier
Dec 16 2004 10:17PM
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TrashyA
Posts: 5 - Karma: 10
I THOUGHT THIS WUZ GOING 2 BE ABOUT BONERS LOL
Dec 16 2004 10:26PM
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