Post subject: Trying to measure how far my potato cannon shoots.
Posted: Fri Jul 06, 2012 3:17 am
Joined: Thu Jun 07, 2012 8:05 pm
Where should I go to do it? A football field is definitely too small. The only marked land I can think of would be a driving range and I think of golf as being a high-SES sport, so I wouldn't imagine the owners would let me shoot it there, even if it were after hours.
Post subject: Re: Trying to measure how far my potato cannon shoots.
Posted: Tue Jul 10, 2012 1:44 pm
Joined: Sat Jan 16, 2010 11:48 am Location: In Front Of My Teraminx (saying WTF?)
well if we're talking smashing you can always calculate drag, but it's out of my league to post something correct, so in short range you get v=v0, which could go from 50 to 900 (world record, 3 times faster than sound) m/s which is basically, for a 200g potato: 1/2*0.2*v0²=0.1v0² J of kinetic energy.
So for 50-900 m/s, you get Ec (kinetic energy, but i'm french so sorry for the different letters ^^) varying from Ec(min)=5 J to Ec(max)=90 J
The strength of your potato launcher is equivalent to the strenght of ________ at __ to __ [unit of speed]
Queen Mary 2: 0,000257-0.00109 m/s Electron: 4.68*10^10-3.31*10^15 times the speed of light Car: 0.1-0.4243 m/s
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