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Get off my lawn!
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Waves on the pendulum
Way cool video!
You may recall from a Mechanics course that the period of a pendulum is proportional to the square root of the length of the line suspending the weight - i.e., the longer the pendulum, the slower it swings. Harvard students built a device with a series of 15 pendulums in a row, each one slightly longer than its neighbor, then set them in motion and filmed the result. The resulting patterns in this short video are quite fascinating to watch. - Simple Harmonic (and non-harmonic) Motion § Harvard Natural Sciences Lecture Demonstrations
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Glen 49 Year member of the Porsche Club of America 1985 911 Carrera; 2017 Macan 1986 El Camino with Fuel Injected 350 Crate Engine My Motto: I will never be too old to have a happy childhood! |
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12-12-2011, 01:10 PM
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Too big to fail
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You tricked me into staring at some guys dangling balls!
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"You go to the track with the Porsche you have, not the Porsche you wish you had." '03 E46 M3 '57 356A Various VWs |
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12-12-2011, 01:19 PM
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Get off my lawn!
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Yea, but they are really cool! The patterns they make are amazing.
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Glen 49 Year member of the Porsche Club of America 1985 911 Carrera; 2017 Macan 1986 El Camino with Fuel Injected 350 Crate Engine My Motto: I will never be too old to have a happy childhood! |
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12-12-2011, 01:21 PM
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Registered
Join Date: Sep 2005
Location: So. Cal.
Posts: 11,239
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That's one of the coolest things I've seen on youtube!
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David 1972 911T/S MFI Survivor |
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12-12-2011, 02:11 PM
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Max Sluiter
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Cool!
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1971 911S, 2.7RS spec MFI engine, suspension mods, lightened Suspension by Rebel Racing, Serviced by TLG Auto, Brakes by PMB Performance |
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12-12-2011, 02:39 PM
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Non Compos Mentis
Join Date: May 2001
Location: Off the grid- Almost
Posts: 10,591
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Very interesting. Thanx!
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12-12-2011, 02:58 PM
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entertaining the idea
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That was really cool to watch. Thanks!
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12-12-2011, 03:30 PM
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Registered
Join Date: Oct 2003
Location: Michigan
Posts: 14,093
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Very cool. It kept my 5YO mesmerized......for a bit.
I bet that would be trippy if one were to be feeling a little tipsy. 
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1981 911SC ROW SOLD - JULY 2015 Pacific Blue Wayne |
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12-12-2011, 03:32 PM
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Cogito Ergo Sum
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How do I build my own???!
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12-12-2011, 03:35 PM
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I'm with Bill
Join Date: Jun 2005
Location: Scottsville Va
Posts: 24,186
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Cool
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Electrical problems on a pick-up will do that to a guy- 1990C4S |
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12-12-2011, 03:39 PM
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Registered
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Nice balls Glen
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Pete 79 911SC RoW "Tornadoes come out of frikkin nowhere. One minute everything is all sunshine and puppies the next thing you know you've got flying cows".- Stomachmonkey |
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12-12-2011, 04:08 PM
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Cogito Ergo Sum
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Would be cool with multiple colors...
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12-12-2011, 04:13 PM
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Registered
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75 911S Targa - Mine from 2001 until sold to Germany buyer 10/2016 <ALL DIY> Brakes/Wheels '01, Body/paint/restoration 7/04, Suspension 3/07 Engine rebuild - done 7/08 - added 28 tube cooler and SSIs - running strong. Ducktail painted. 2021 MachE, 2012 Outback, 2019 Crosstrek, 2018 Impreza wagon |
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12-12-2011, 04:34 PM
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Carrera
1971 Porsche 911S
1983 Porsche 944 2.5L
1986 Porsche 944 2.5l
1979 Porsche 911SC
Targa
