Pendulums with a hippopotamus and a bird. Fun physical experience at home

ENTERTAINING EXPERIENCES AT HOME
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Pendulums with a hippopotamus and a bird. Physical experiments

Entertaining experiments in physics

Entertaining experiences at home / Physics experiments for children

You've certainly seen a lot of things swing. The hammock is swinging. The chandelier sways in the draft. And in the watch workshop - how many clocks with swinging pendulums are there! It's just eyes wide open. And pendulums swing differently. Tick-tock, tick-tock, - a light, small pendulum of walkers is in a hurry. So! So! - solidly confirms the large and heavy pendulum of the clock standing on the floor. It swings much less frequently.

Why do pendulums have different swing frequencies? Let's check. Instead of pendulums, you can take any two bodies of different weights. Again, I took my favorite figures: a heavy hippo and a light bird.

Hang the hippopotamus on a thread about 1 m long, and the bird on a thread 25 cm long. Now swing them not very hard. You will see that the light bird flutters to the right - to the left, to the right - to the left. A heavy, solid hippo sways about twice as slow.

Pendulums with a hippopotamus and a bird

It would seem that everything is clear. A heavy body oscillates slowly, a light body oscillates quickly. But do not rush to draw conclusions. Do the same experiment by changing the threads. You will see that a hippopotamus tied to a short "bird" thread will lose all its solidity. He will fuss, hurry, will, like a bird, flutter right and left, right and left!

But the bird, suspended on a long "hippopotamus" thread, will take on the habit of a hippopotamus. She will begin to swing solidly, importantly, slowly. It turns out that the swing frequency does not depend on weight at all. It depends on the length of the pendulum! The small pendulum of the walkers swings so fast not because it is light, but because it is short!

Author: Galpershtein L.Ya.

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