Experiments in physics. Interesting experiments in physics

Most people, remembering their school years,We are sure that physics is a very boring subject. The course includes many tasks and formulas that will not be useful to anyone in later life. On the one hand, these statements are true, but, like any object, physics has another side to the coin. Only not everyone discovers it.

A lot depends on the teacher

Perhaps our system’s faulteducation, and maybe the whole thing in the teacher, who thinks only that you need to report off the material approved above, and does not seek to interest their students. Most often he is to blame. However, if the children are lucky and the lesson is taught by a teacher who himself loves his subject, he will be able not only to interest the students, but also help them discover something new for themselves. As a result, this will lead children to enjoy attending such classes with pleasure. Of course, the formulas are an integral part of this academic subject, there is no getting around this. But there are positive moments. Of particular interest among schoolchildren are experiments. Here we will talk about it in more detail. We will look at some interesting physics experiments that you can spend with your child. This should be interesting not only for him, but also for you. It is likely that with the help of such activities you will instill in your child a genuine interest in learning, and your favorite subject for him will be “boring” physics. It is not difficult to carry out experiments at home, it will require very few attributes, as long as there is a desire. And, perhaps, then you can replace your school teacher with your child.

Let us consider some interesting experiments in physics for small ones, because you need to start small.

Paper fish

Чтобы провести данный эксперимент, нам необходимо cut out of thick paper (cardboard can be) a small fish, the length of which should be 30-50 mm. We make in the middle of a round hole with a diameter of about 10-15 mm. Next, from the tail side, cut a narrow channel (3-4 mm wide) to a round hole. After that, we pour water into the basin and carefully place our fish there in such a way that one plane lies on the water and the second remains dry. Now it is necessary to drop oil into a round hole (you can use a grease gun from a sewing machine or a bicycle). Oil, trying to spill on the surface of the water, will flow through the cut channel, and the fish will float forward under the action of the oil flowing back.

Elephant and Pug

Продолжим проводить занимательные опыты по физике with your baby. We offer you to acquaint your child with the concept of a lever and how it helps to facilitate the work of a person. For example, tell us that with it you can easily lift a heavy wardrobe or sofa. And for clarity, to show an elementary experience in physics using a lever. To do this, we will need a ruler, a pencil and a couple of small toys, but they must be of different weights (that is why we called this experience “Elephant and Pug”). Fasten our Elephant and Pug on different ends of the ruler using plasticine, double-sided tape or ordinary thread (just tied toys). Now, if you put the ruler with the middle part on a pencil, then the elephant will, of course, drag it, because it is heavier. But if you move the pencil in the direction of an elephant, then the Pug will easily outweigh it. That is the principle of leverage. The ruler (lever) rests on a pencil - this place is the fulcrum. Next, the child should be told that this principle is used everywhere, it is the basis of the crane, swings and even scissors.

Home experience in physics with inertia

We will need a bank of water and economicgrid. It will not be a secret for anyone that if an open can is turned over, water will flow out of it. Let's try? Of course, for this it is better to go out. We put the jar in the net and begin to gently rock it, gradually increasing the amplitude, and as a result we make a full turn - one, second, third and so on. Water does not overflow. Interesting? And now make the water pour up. To do this, take a can and make a hole in the bottom. We put in the net, fill with water and start to rotate. From the hole beats jet. When the bank is in the lower position, it does not surprise anyone, but when it flies up, then the fountain continues to beat in the same direction, and from the neck - not a drop. That's it. All this may explain the principle of inertia. When the bank rotates, it tends to fly straight away, but the grid does not let it in and forces it to describe circles. Water also tends to fly by inertia, and in the case when we have made a hole in the bottom, nothing prevents it from escaping and moving straightforwardly.

Surprise boxes

Now consider the physics experiments with the displacementcenter of mass. You need to put a matchbox on the edge of the table and slowly move it. The moment he passes his average mark, a fall will occur. That is, the mass of the part pushed beyond the edge of the tabletop will exceed the weight of the rest, and the box will tip over. Now we shift the center of mass, for example, we put inside (as close as possible to the edge) a metal nut. It remains to place the boxes in such a way that a small part of it remains on the table and the large one hangs in the air. The fall will not happen. The essence of this experiment is that the whole mass is above the fulcrum. This principle is also used everywhere. It is thanks to him that furniture, monuments, transport, cranes and much more are in a stable position. By the way, the children's toy Vanka-Vstanka is also built on the principle of displacement of the center of mass.

So, we will continue to consider interesting experiments in physics, but we will move on to the next stage - for sixth grade students.

Water carousel

We need an empty tin can, a hammer,nail rope. Punch with a nail and a hammer in the side wall at the bottom of the hole. Next, without pulling the nail out of the hole, bend it to the side. It is necessary that the hole turned oblique. We repeat the procedure from the second side of the can - you need to make it so that the holes are opposite each other, but the nails are bent in different directions. In the upper part of the vessel we pierce two more holes, in them we pass the ends of a rope or a thick thread. Suspend the container and fill it with water. From the lower holes will begin to beat two oblique fountain, and the bank will begin to rotate in the opposite direction. On this principle I work space rockets - the flame from the nozzles of the engine hits one side, and the rocket flies to the other.

Experiments in physics - Grade 7

Let's conduct an experiment with mass density and find outhow can you make an egg swim. Experiments in physics with different densities are best carried out using fresh and salt water as an example. Take a jar filled with hot water. We drop an egg into it, and it will immediately sink. Next, pour the salt into the water and stir. The egg begins to float, and, the more salt, the higher it will rise. This is because salt water has a higher density than fresh water. So, we all know that in the Dead Sea (its most salty water) is almost impossible to drown. As you can see, experiments in physics can significantly increase the horizons of your child.

Balloon and plastic bottle

Seventh grade schoolchildren begin to learnatmospheric pressure and its effects on the objects around us. To uncover this topic more deeply, it is better to conduct corresponding experiments in physics. Atmospheric pressure affects us, although it remains invisible. Let's give an example with a balloon. Each of us can cheat him. Then we put it in a plastic bottle, put the edges on the neck and fix it. Thus, air can only flow into the balloon, and the bottle will become an airtight container. Now try to inflate the ball. We will fail, because the atmospheric pressure in the bottle will not allow us to do this. When we blow, the ball begins to force out the air in the vessel. And since our bottle is airtight, it has nowhere to go, and it begins to shrink, thereby becoming much denser than air in a balloon. Accordingly, the system is leveled, and the ball can not be inflated. Now we will make a hole in the bottom and try to inflate the ball. In this case, there is no resistance, the displaced air leaves the bottle - the atmospheric pressure is equalized.

Conclusion

As you can see, experiments in physics are not complicated at all andquite interesting. Try to interest your child - and study for him will take place quite differently, he will begin to attend classes with pleasure, which in the end will affect his academic performance.