A swinging wolf. Fun physical experience at home

ENTERTAINING EXPERIENCES AT HOME
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A swinging wolf. Physical experiments

Entertaining experiments in physics

Entertaining experiences at home / Physics experiments for children

The spinning top has amazing stability. He always tries to stand upright. Even if its axis of rotation is slightly tilted, it still will not fall, struggling with the force of gravity of the Earth, which tends to overturn it. In this case, the end of its axis will describe circles.

Some physical devices are based on the stability of the axis of a rotating top, on its desire to maintain the same direction in space. One such device is the gyrocompass. Its readings, unlike a magnetic compass, are very reliable, as they do not depend on the influence of surrounding iron and steel objects.

With the help of a pendulum, one can verify how the axis of a rotating top maintains its direction in space.

For this experiment, take the largest pot lid (preferably 30-35 centimeters in diameter), tie two strong ropes a little more than a meter long to it and hang it on a strong crossbar.

If you swing the lid, it will swing on the ropes, all the while forming a right angle with them. If you strike the edge of the cover during these swings, it will swing with vibration of the edges.

swing top

Let's move on to the second part of our experience. Between the ropes at their upper end, insert a round wooden stick with a diameter of one and a half to two centimeters. Then, holding this stick with one hand, with the other hand, begin to rotate the lid hanging horizontally. You need to rotate it for a long time so that the ropes twist well among themselves. When this happens, release the lid. It will begin to rotate in the other direction, and you, gradually increasing the pressure, press the wand on the place where the ropes are twisted. The lid will rotate faster and faster.

Finally, before reaching the very bottom, to the lid, about 20 centimeters, remove the stick from the ropes and swing the ropes as far as possible to the side. You will see that our pendulum now swings in a completely different way than when the lid did not rotate. Now the cover is worn all the time in front of you strictly horizontally. The angle between the lid and the ropes on which it hangs changes all the time from sharp to blunt. A right angle is now obtained only when the ropes pass the vertical position.

swing top

At a high rotation speed, the rope covers twist in the opposite direction, the rotation slows down and stops completely. The pendulum now swings with a randomly dangling cap.

During this experiment, when the pendulum is swinging with the lid rotating rapidly, it became more difficult to make it vibrate by striking it with the hand, as you did when the lid was not rotating.

Author: Rabiza F.V.

We recommend interesting experiments in physics:

▪ Cutting magnetic lines of force

▪ jet controls

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▪ Starch is broken down by acid

See other articles Section Entertaining experiences at home.

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