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Mythbusters Experiment Goes Awry


submitted by: madest
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Hits: 15808 | Favorites: 0 | Emailed: 6 | Rating: 2.9 | Category: News & Politics | Date: 12/07/2011
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More Comments >

Male, 18-29, Western US
 559 Posts
Friday, December 9, 2011 2:12:30 AM

Male, 18-29, Canada
 916 Posts
Thursday, December 8, 2011 10:40:16 PM
Mythbusters has always sucked, and considering I've never even seen the show, that`s saying a lot.

Male, 40-49, Europe
 12381 Posts
Thursday, December 8, 2011 3:37:40 PM
I don't know how it`s possible that a cannonball could have enough momentum to travel that far, rip through a concrete wall, then through a WHOLE HOUSE, off someone`s roof, bounce across the road, and through a minivan. WTF did they load that thing with? Uranium?

A full size cannonball at 1000fps has about as much kinetic energy as a car travelling at 95 mph. But the force of impact would be over a far smaller area (so far higher pressure) and the ball is far more solid than the car.

Numbers, so you can see I`m not just pulling it out of the air:

1000fps = 304.8 m/s
Mass of ball = 42 lbs = ~19Kg.

KE of ball = ~880 KJ

95mph = ~42.5 m/s
Mass of car = 1000Kg

KE of car = ~900 KJ.

Male, 40-49, Europe
 12381 Posts
Thursday, December 8, 2011 3:10:44 PM
traveling at 1000f/ps a 2kg cannon ball would weigh 600kg..

kg is a unit of mass, not weight. So what did you actually mean? 1000fps is nowhere near close enough for relatavistic effects to be of any relevance, so the 2Kg ball will still have a mass of 2Kg.

The equivalent of a 600Kg ball dropped 1m in average Earth gravity, maybe?

Male, 18-29, Southern US
 2994 Posts
Thursday, December 8, 2011 1:42:06 PM
You can't get rid of MythBusters! You already took away NASA, what else will keep the generations to come interested in science?

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