Balance a vertical stick (Rotational Inertia)
In this applet, the hand is chosen as the (noninertial) frame of observation. When the stick tends to fall to the front, the hand should accelerate forward in order to give a backward inertial force on the stick to stop its rotation, and vice versa.
To simulate a forward (backward) acceleration, click the front (rear) part of the hand. Each click gives the same amount of acceleration over the same time interval. Click the right button of your mouse will give a larger acceleration. If you want the acceleration lasts for a longer time, just click the same place several times.
Your goal is to keep the stick not falling down as long as possible.
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In
short, a larger rotational inertia will give a larger resistance to
a rotational change.
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