Examples of traditional goal setting

Joule, a famous British scientist, loved physics since he was a child. He often does some experiments about electricity and heat by himself.

One holiday, Joule and his brother traveled to the suburbs. Joule, who is clever and studious, never forgets to do his physics experiments even when he is playing.

He found a lame horse, led by his brother, and quietly hid behind him. He used a volt battery to electrify the horse, trying to see how the animals reacted after being stimulated by the current. As a result, the reaction he wanted to see appeared. The horse jumped wildly after being shocked and almost kicked its younger brother.

Although the danger has appeared, it has not affected the mood of little Joule who loves to do experiments. He rowed with giggle to the lake surrounded by mountains, where Joule wanted to try the echo. They filled the musket with gunpowder and then pulled the trigger. Who knows "bang", a long flame spouted from the muzzle and burned Joule's eyebrows, almost scaring my brother into the lake.

At this time, the sky was covered with thick clouds, lightning and thunder. Joule, who just wanted to go ashore to take shelter from the rain, found that it took a long time to hear the thunder after every lightning. What happened?

Joule didn't take shelter from the rain, dragging his brother up a hill and carefully recording the time of lightning and thunder with his pocket watch.

After school started, Joule almost wanted to tell the teacher all the experiments he had done and ask for advice from the teacher.

The teacher smiled at Joule, who was eager to learn and curious, and patiently explained to him: "The speed and harmony of light are different. The speed of light is fast and the speed of sound is slow, so people always want to see lightning before hearing thunder, but in fact lightning and thunder happen at the same time. "

Joule suddenly realized. Since then, he has been more fascinated by learning scientific knowledge. Through continuous study and careful observation and calculation, he finally discovered the mechanical equivalence of heat and the law of conservation of energy, and became an excellent scientist.

2. Knowledge-self-improvement

Prague, an English physicist, was poor when he was a child. With his unremitting pursuit of his dreams and tenacious efforts, he finally made great achievements. And the poor years he experienced became the driving force that inspired him to move on in the future.

When he was studying at school, his parents could not buy him nice clothes and comfortable shoes because of the poor economic conditions at home. He is often in rags, dragging a pair of worn leather shoes that don't match his feet. But young Prague never felt inferior because of poverty, and he never complained that his family could not provide him with superior living conditions. Those oversized shoes look ridiculous on his feet, but he doesn't feel inferior. On the contrary, he cherishes these shoes very much, because they can bring him unlimited motivation.

It turns out that this pair of shoes was given to him by his father. The family is poor, so we can't buy him a pair of comfortable and strong shoes. Even these old leather shoes are his father's. Although the father was also full of guilt, he still gave his son ardent hope, unparalleled encouragement and strong emotional support. His father wrote in his letter ... I'm sorry, son. I hope in a year or two, my shoes won't be too big on your feet. "... I hope that once you achieve something, I will be proud of it, because my son works hard in my broken shoes. ..... "This letter with profound meaning and full of expectation has always been like an invisible force, pushing Prague to walk on the rugged scientific mountain road and step on thorns. Galileo's story

Galileo was born in Pisa, Italy on 1564, next to the famous leaning tower of Pisa. His father is a bankrupt aristocrat. When Galileo came into this world, his family was already poor. /kloc-At the age of 0/7, Galileo was admitted to the University of Pisa. In college, Galileo not only studied hard, but also liked to ask questions to his teachers. Even if it is something that people are used to, he will get to the bottom of it, and it will be clear at a glance.

Keep your eyes on the ceiling

Once, he stood in the Catholic church in Pisa, staring at the ceiling, motionless. What is he doing? It turned out that he followed the pulse of his left hand with his right hand and looked at the light swinging back and forth on the ceiling. He found that although the swing of the lamp is getting weaker and weaker, the distance of each swing is gradually shortened, but the time required for each swing is the same. So Galileo made a pendulum with a suitable length to measure the speed and uniformity of the pulse. From here, he discovered the law of pendulum. This clock is made according to the law he discovered.

If you drop out of school, study hard.

The poverty of family life forced Galileo to leave college early. After dropping out of school, Galileo still studied hard at home. Thanks to his continuous efforts, he has made excellent achievements in mathematics research. At the same time, he also invented the pycnometer and wrote a paper entitled "The Center of Gravity of Solids". At this time, Galileo, 2 1 year-old, has become famous all over the country, and people call him "the contemporary Archimedes". At the age of 25, Pisa University made an exception and hired him as a professor of mathematics.

The world-famous falling body experiment

Before Galileo, Aristotle in ancient Greece thought that the speed of falling objects was different. Its falling speed is proportional to its weight. The heavier the object, the faster it falls. For example, an object weighing 10 kg falls 1 0 times faster than an object weighing1kg.

Since 1700 years ago, people have always regarded this theory that violates the laws of nature as an indisputable truth. Young Galileo boldly questioned Aristotle's theory based on his own empirical reasoning. After careful consideration, he decided to do an experiment by himself. He chose the Leaning Tower of Pisa as the experimental field. On this day, he brought two iron balls with the same size but different weights, one of which weighed 100 Jin and was solid; The other one weighs 1 kg and is hollow. Galileo stood on the leaning tower of Pisa and looked under it. The tower was crowded with people who came to watch, and everyone was talking about it. Someone sarcastically said, "This young man must be crazy! Aristotle's theory cannot be wrong! " The experiment began. Galileo took an iron ball in each hand and shouted, "Look carefully, people below, the iron ball is going to fall." With that, he opened his hands at the same time. People saw two iron balls falling in parallel and falling to the ground almost at the same time. All the people were dumbfounded. Galileo's experiment revealed the secret of falling body movement and overthrew Aristotle's theory. This experiment is of epoch-making significance in the history of physics development.