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phetsims / pendulum-lab

"Pendulum Lab" is an educational simulation in HTML5, by PhET Interactive Simulations.
GNU General Public License v3.0
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Possible to record period while pendulum is not in motion #25

Closed arouinfar closed 9 years ago

arouinfar commented 9 years ago

It is possible to record the period of the pendula while they are not in motion. This only appears to be an issue after their motion has been stopped using friction.

To reproduce: 1) Open the lab screen, and displace both pendula. 2) Increase friction to the maximum value and wait for the pendula to stop swinging. The displacement tick marks will still be showing in the protractor, even though they have been stopped. 3) Start period timer. The period will be recorded even though the pendulum is not in motion.

Measuring the period of pendulum 1: image

Measuring the period of pendulum 2: image

andrey-zelenkov commented 9 years ago

Prevented infinite motion after friction. Reassign to @arouinfar for verification.

arouinfar commented 9 years ago

Fixed, closing.