Experiments in physics. Interesting experiments in physics

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

Very much depends on the teacher

Perhaps, our education system is to blame for this, or maybe it's all about the teacher who thinks only that it is necessary to read the material approved from above, and does not seek to interest his students. Most often it is he who is to blame. However, if the children are lucky, and they will have a lesson taught by a teacher who himself loves his subject, he can not only interest the students, but also help them discover something new. That as a result will lead to the fact that children will begin to enjoy such activities with pleasure. Of course, formulas are an integral part of this academic subject, this can not be avoided. But there are also positive moments. Experiants cause special interest among schoolchildren. We'll talk about this in more detail. We will consider some entertaining experiments in physics that you can spend with your child. This should be interesting not only to him, but to you. It is likely that with the help of such classes you will instill in your child a genuine interest in learning, and his favorite subject will be "boring" physics. Experiments in the home are not difficult to conduct, it takes quite a bit of attributes, the main thing is that there is a desire. And, perhaps, then you can replace your child with a school teacher.

Let's look at some interesting experiments on physics for small children, because we need to start small.

Paper Fish

In order to conduct this experiment, we need to cut out a small fish from the thick paper (you can cardboard), the length of which should be 30-50 mm. We make in the middle a round hole about 10-15 mm in diameter. Then, from the side of the tail, cut a narrow channel (3-4 mm wide) to a round hole. Then pour the water into the pelvis and carefully place our fish there so that one plane lies on the water, and the second - it remains dry. Now it is necessary to drip oil into the round hole (you can use the oil can from the sewing machine or bicycle). Oil, trying to spill over the surface of the water, flows through the cut channel, and the fish, under the action of the backward oil, will swim ahead.

Elephant and Moska

We continue to conduct entertaining experiments in physics with your child. We suggest that you introduce the child to the concept of a lever and how it helps to facilitate the work of a person. For example, tell me that with it you can easily lift a heavy closet or sofa. And for clarity, show an elementary experience in physics with the use of a lever. For this we need a ruler, a pencil and a couple of small toys, but necessarily different weights (that's why we called this experience "Elephant and Moska"). We fasten our Elephant and Moska to the different ends of the ruler with the help of plasticine, double-sided scotch or usual thread (just tied toys). Now, if we put the ruler in the middle part on a pencil, then it will, of course, pull the elephant, because it is heavier. But if you move the pencil in the direction of the elephant, then Moska easily outweigh it. This is the principle of the lever. The ruler (lever) rests on a pencil - this place is the fulcrum. Then the child should be told that this principle is used everywhere, it is laid in the basis of the work of the crane, swings and even scissors.

Home experience in physics with inertia

We need a jar of water and a household mesh. It will not be a secret for anyone that if the open can is turned over, the water will flow out of it. Let's try? Of course, for this it is better to go out into the street. We put the jar in the net and start smoothly swinging it, gradually increasing the amplitude, and as a result we make a complete revolution - one, two, three, and so on. The water does not pour out. Interesting? Now let's make the water pour up. To do this, take a tin can and make a hole in the bottom. We put it in a grid, fill it with water and start to rotate. From the hole a jet strikes. When the pot is in the lower position, it does not surprise anyone, but when it soars up, the fountain continues to hit in the same direction, and from the mouth - not a drop. Here so. All this can explain the principle of inertia. When you rotate the bank tends to fly straight, and the grid does not let it in and makes you describe the circles. Water also tends to fly by inertia, and in the case when we made a hole in the bottom, nothing prevents it from escaping and moving rectilinearly.

Boxes with a surprise

Now consider the experiments on physics with a shift of the center of mass. It is necessary to put a matchbox on the edge of the table and move it slowly. At the moment when he passes his average mark, there will be a fall. That is, the weight of the part pushed out beyond the edge of the countertop will exceed the weight of the remaining one, and the box will capsize. Now we will shift the center of mass, for example, put inside (as close as possible to the edge) a metal nut. It remains to put the box in such a way that a small part of it remains on the table, and the big one hangs in the air. The fall will not happen. The essence of this experiment is that the whole mass is above the support point. This principle is also used everywhere. It is thanks to him in a stable situation are furniture, monuments, transport, cranes and much more. 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 on physics, but we will proceed to the next stage - for schoolchildren of the sixth grades.

Water carousel

We need an empty can, a hammer, a nail, a rope. We punched with a nail and a hammer in the side wall near the bottom of the hole. Further, without stretching the nail from the hole, bend it to the side. It is necessary that the hole turned oblique. Repeat the procedure on the second side of the can - you need to make it so that the holes are opposite each other, but the nails were bent in different directions. In the upper part of the vessel we punched two more holes, in them we pass the ends of the rope or thick thread. We hang the container and fill it with water. From the lower holes will begin to beat two oblique fountains, and the bank will start to rotate in the opposite direction. On this principle, work space rockets - the flame from the engine nozzles hits one way, and the missile flies to the other.

Experiments in Physics - Grade 7

We will carry out an experiment with the mass density and find out how to make the egg swim. Experiments on physics with different densities are best carried out with the example of fresh and salt water. Take a jar full of hot water. We lower the egg into it, and it immediately drowns. Next, pour the salt into the water and stir. The egg starts to float, and, the more salt, the higher it will rise. This is because the salt water has a higher density than the fresh water. So, everyone knows that in the Dead Sea (its water is the most salty) it is almost impossible to drown. As you can see, experiments in physics can significantly increase the outlook of your child.

Balloon and a plastic bottle

Schoolchildren of the seventh classes begin to study atmospheric pressure and its impact on the objects around us. To reveal this topic deeper, it is better to conduct relevant experiments in physics. Atmospheric pressure has an effect on us, although it remains invisible. Let us 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 enter the ball, and the bottle will become a sealed vessel. Now let's try to inflate the ball. We will not succeed, because the atmospheric pressure in the bottle will not allow us to do this. When we blow, the ball begins to displace the air in the vessel. And since the bottle is tight, it has nowhere to go, and it starts to contract, thereby becoming much denser than air in the ball. Accordingly, the system is leveled, and the balloon can not be inflated. Now 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 on physics are not at all complicated and quite interesting. Try to interest your child - and study for him will be very different, he will start with pleasure to attend classes, which in the end will affect his academic performance.