Elastic coins. Fun physical experience at home

ENTERTAINING EXPERIENCES AT HOME
Directory / Entertaining experiences / Experiments in physics

Elastic coins. Physical experiments

Entertaining experiments in physics

Entertaining experiences at home / Physics experiments for children

For this experience, pick up a few identical coins, such as nickels. They must be straight and not bent. Put two of them on the table at some distance from one another. Now sharply click on one penny so that it slides on the table and hits another. If you hit exactly, head-on, then the first nickel will stop almost immediately, and the second will bounce and, as it were, continue the movement of the first.

Why did it happen? Again, due to flexibility. Hitting one against the other, both coins are compressed at the first moment, But elasticity tends to restore their original shape. The force of elasticity "pushes" the colliding coins in opposite directions. Therefore, the first coin that hit receives its hit back and stops, while the second coin bounces and continues the movement of the first.

The experiment can be complicated by laying several coins on the table in a row on the same line so that they touch one another. What happens if you hit another coin on the last coin of the row? The hitting coin will stop dead in its tracks. Her push will be transmitted throughout the row. One by one, the coins will compress and then decompress again. In this case, each struck coin will receive its push back, and each struck coin will transmit it further. And only the very last coin in the series will have nothing to transmit a push and nothing to receive it back from. Therefore, it, unclenching, will push off from the penultimate coin and bounce off!

This experiment can be done with checkers. Hold the last checker in the row from above with your finger and hit the edge with a wooden ruler. A checker will bounce from the other end, and always only one.

elastic coins

The same experiments can be done with billiard or croquet balls. Only in all cases you need to hit exactly, "head to head." With an oblique strike, the hitting coin or ball does not stop, but only deviates to the side and slows down its movement. And the hit body bounces at an angle to the side.

Author: Galpershtein L.Ya.

We recommend interesting experiments in physics:

▪ circus act

▪ The air is pushing

▪ Convection from the heat of the hand

We recommend interesting experiments in chemistry:

▪ Watercolor

▪ Turning water into blood

▪ Semipermeable septum in a plant cell

See other articles Section Entertaining experiences at home.

Read and write useful comments on this article.

<< Back

Latest news of science and technology, new electronics:

Artificial leather for touch emulation 15.04.2024

In a modern technology world where distance is becoming increasingly commonplace, maintaining connection and a sense of closeness is important. Recent developments in artificial skin by German scientists from Saarland University represent a new era in virtual interactions. German researchers from Saarland University have developed ultra-thin films that can transmit the sensation of touch over a distance. This cutting-edge technology provides new opportunities for virtual communication, especially for those who find themselves far from their loved ones. The ultra-thin films developed by the researchers, just 50 micrometers thick, can be integrated into textiles and worn like a second skin. These films act as sensors that recognize tactile signals from mom or dad, and as actuators that transmit these movements to the baby. Parents' touch to the fabric activates sensors that react to pressure and deform the ultra-thin film. This ... >>

Petgugu Global cat litter 15.04.2024

Taking care of pets can often be a challenge, especially when it comes to keeping your home clean. A new interesting solution from the Petgugu Global startup has been presented, which will make life easier for cat owners and help them keep their home perfectly clean and tidy. Startup Petgugu Global has unveiled a unique cat toilet that can automatically flush feces, keeping your home clean and fresh. This innovative device is equipped with various smart sensors that monitor your pet's toilet activity and activate to automatically clean after use. The device connects to the sewer system and ensures efficient waste removal without the need for intervention from the owner. Additionally, the toilet has a large flushable storage capacity, making it ideal for multi-cat households. The Petgugu cat litter bowl is designed for use with water-soluble litters and offers a range of additional ... >>

The attractiveness of caring men 14.04.2024

The stereotype that women prefer "bad boys" has long been widespread. However, recent research conducted by British scientists from Monash University offers a new perspective on this issue. They looked at how women responded to men's emotional responsibility and willingness to help others. The study's findings could change our understanding of what makes men attractive to women. A study conducted by scientists from Monash University leads to new findings about men's attractiveness to women. In the experiment, women were shown photographs of men with brief stories about their behavior in various situations, including their reaction to an encounter with a homeless person. Some of the men ignored the homeless man, while others helped him, such as buying him food. A study found that men who showed empathy and kindness were more attractive to women compared to men who showed empathy and kindness. ... >>

Random news from the Archive

How the brain remembers faces 29.12.2017

A team of scientists led by Doris Tsao, a biologist at the California Institute of Technology, using a combination of brain mapping and recording of individual neuron signals, appears to have cracked the neural code for facial recognition in primates. Scientists have found that the frequency of pulsation of each cell of certain areas of the face (face patches, and this is the term) corresponds to its individual features. Cells can "tune" to respond to bits of information like a system of scales, and then combine these bits in various ways to reproduce each feature of the seen "face" of the animal.

A study of the brain's ability to process images showed that several regions of the temporal lobe of the brain, the size of a blueberry, are responsible for face recognition.

To understand how cells perform this recognition function, Cao and Steven Le Chang took 2000 pictures of faces that differed in 50 features, including facial roundness, distance between the eyes, and skin tone and texture. They showed these pictures to two monkeys, recording the activity of individual neurons in three different facial patches of both animals.

It turned out that neurons respond only to one particular feature. Hippocampal neurons encode non-individual faces. Neurons divide facial images into small sections and encode certain features, such as the width of the hairline. Moreover, individual neurons also process additional information. Data from different parts of the face are combined to get a complete picture.

By understanding how this division of labor works, Chang and Cao were able to predict how neurons would react to a completely new face. They developed a mathematical model in which facial features were encoded by various neurons. They then showed the monkey an image of a face that it had not seen before. Using the created algorithm, scientists were able, based on the data obtained on the reactions of neurons, to digitally form an image of the face seen by the monkey. The reproduction turned out to be almost indistinguishable from the image that the monkey saw.

Other interesting news:

▪ Modernization of Windea Leibniz, a wind service vessel

▪ From trembling in the hands

▪ Potatoes with "awakened" genes successfully resist late blight

▪ Stem cells help cure alcoholism

▪ Animals sense the magnetic field thanks to bacteria

News feed of science and technology, new electronics

Interesting materials of the Free Technical Library:

▪ section of the site Security and safety. Article selection

▪ article by Virginia Woolf. Famous aphorisms

▪ article What is extrasensory perception? Detailed answer

▪ article Repairman for equipment repair. Standard instruction on labor protection