Balance a vertical stick (Rotational Inertia)
When the stick tends to fall forward (backward), click the front (rear) part of the hand repeatedly until balance is restored.
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.
Your goal is to keep the stick not falling down as long as possible.
The related physics:
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In
short, a larger rotational inertia will give a larger resistance to
a rotational change.
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