Stable pencil. Fun physical experience at home

ENTERTAINING EXPERIENCES AT HOME
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Stable pencil. Physical experiments

Entertaining experiments in physics

Entertaining experiences at home / Physics experiments for children

If the previous experience had to struggle artificially with an unstable equilibrium, then no art is needed in this experiment. This is an old, very visual experience.

steady pencil

You probably have a penknife, a pencil too. Sharpen the pencil so that it has a sharp end, and stick a half-open penknife a little higher than the end. Place the tip of the pencil on your index finger, and the pencil will stand on your finger, swaying slightly. Now the question is: where is the center of gravity of the pencil and penknife? The answer is simple: at the intersection of a plumb line drawn through the fulcrum and the knife handle. That is, in the handle itself, well below the fulcrum.

Author: Rabiza F.V.

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