Loose End Design

[elisemorgan]

Test device: Mac, Personal

Operating System: OS X 10.10.5

Browser: Safari 9.0.3 (10601.4.4)

Problem description: This issue was originally observed on the iPad 2 w/ iOS 8.4.1. The behavior on the iPad was more extreme then what I captured below. It is possible for the ring to escape the end of the pole, and I can't tell whether or not this is a design decision. On the iPad, the ring sometimes jumps all the way down to the PhET menu or out of the screen entirely.

Steps to reproduce: Go to Oscillate mode, set frequency and amplitude at max, set tension to low. Observe behavior of ring on loose end.

Severity:

Screenshots: https://drive.google.com/file/d/0B_TAL-jnJOoKOTZuV05ORkFhanM/view?usp=sharing

Troubleshooting information (do not edit):
Name: ‪Wave on a String‬
URL: http://www.colorado.edu/physics/phet/dev/html/wave-on-a-string/1.1.0-rc.1/wave-on-a-string_en.html
Version: 1.1.0-rc.1 2016-02-25 18:21:38 UTC
Features missing: touch
Flags: pixelRatioScaling
User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_10_5) AppleWebKit/601.4.4 (KHTML, like Gecko) Version/9.0.3 Safari/601.4.4
Language: en-us
Window: 1238x660
Pixel Ratio: 2/1
WebGL: WebGL 1.0 (2.1 INTEL-10.6.33)
GLSL: WebGL GLSL ES 1.0 (1.20)
Vendor: WebKit (WebKit WebGL)
Vertex: attribs: 16 varying: 15 uniform: 1024
Texture: size: 16384 imageUnits: 16 (vertex: 16, combined: 16)
Max viewport: 16384x16384
OES_texture_float: true
Dependencies JSON: {"assert":{"sha":"7d27130a","branch":"HEAD"},"axon":{"sha":"9457f36a","branch":"HEAD"},"babel":{"sha":"ab2c800b","branch":"master"},"brand":{"sha":"ac9ccaa7","branch":"HEAD"},"chipper":{"sha":"b3a8a3c2","branch":"HEAD"},"dot":{"sha":"da78031b","branch":"HEAD"},"joist":{"sha":"28f51008","branch":"HEAD"},"kite":{"sha":"10ca8bf2","branch":"HEAD"},"phet-core":{"sha":"c48bf320","branch":"HEAD"},"phetcommon":{"sha":"68270b86","branch":"HEAD"},"scenery":{"sha":"b34b4fea","branch":"HEAD"},"scenery-phet":{"sha":"71a9c763","branch":"HEAD"},"sherpa":{"sha":"bb68bbbc","branch":"HEAD"},"sun":{"sha":"2b83e994","branch":"HEAD"},"tandem":{"sha":"2441eec6","branch":"HEAD"},"wave-on-a-string":{"sha":"a0865794","branch":"HEAD"}}

[ariel-phet]

the model sometimes go a bit chaotic with these extreme conditions, leaving as deferred until we revisit this sim