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Junior high school physics reading notes 3! ! ! Hurry up! It's closing soon!
I only have one article here, 1000 words. ...

If you lose gravity,

In life, every one of us, every object, even a humble fluff, is subject to a force, which makes all objects finally fall to the ground. This is the magic of the earth, which attracts all kinds of objects and produces a force, which is gravity.

Newton's discovery proved the existence of gravity, or gravity is everywhere. Gravity is really good. Ripe apples fall, people don't have to move ladders, just bend over.

However, some people complain that if someone falls from the second floor, his legs will be worn out, and if he loses gravity, what will happen to the world: the car will fly in the air and cannot move; People in the air, can't; People can only swim indoors.

Water is a symbol of life. Without gravity, it will stop flowing, and the downstream water will dry up because of evaporation. A person can lift heavy things easily; If you love to jump, it's amazing. You flew off the earth in one jump. Many teenagers have worked hard to realize their dream of going into space, and it suddenly became a reality.

If we lose gravity, the environment around us will only get worse. People and all kinds of objects are swimming in the air, which is really terrible.

To sum up, we can't lose gravity. The existence of gravity is the basis of our human existence on the ball.

If there is no gravity

On a certain day in a certain month, the high jump competition of the N Olympic Games was held in Suzhou. Suddenly, an athlete couldn't get off after taking off and kept flying upwards. Fortunately, the ceiling of the venue is closed, otherwise the athletes don't know where to fly.

The audience sitting under the stage also floated in the air, unable to move. Just when people were surprised, a shocking news came from the radio: "Ladies and gentlemen, a UFO suddenly appeared over our city just now. UFO fired a laser at the center of the city, and in an instant, the gravity of the city disappeared.

After listening to the radio, I broke out in a cold sweat Once gravity disappears, it will be difficult for people to move a small step. Many things that were originally easy will become difficult. Air will not adhere to the ground and will be lost at a high speed. People will die of suffocation due to lack of oxygen.

After some efforts, I finally came home. I finally turned on the TV, and there was another terrible news in the news. Within a few minutes after the UFO appeared over Suzhou, the same thing happened all over the world. UFO also issued an ultimatum, demanding that human beings surrender, or they would launch a general attack on the earth within 72 hours. At that time, it was not as simple as letting gravity disappear, but a devastating blow to mankind. This is an alien invasion of the earth.

10 hours later, heads of state and experts from various fields gathered in Suzhou for urgent consultation. After heated discussion, I think it is necessary to use high-energy particle beams to destroy alien spacecraft. After careful preparation, under the cover of the multinational joint air force, a modified plane carrying a high-energy particle beam launcher flew to an alien spacecraft. A beam of high-energy particles was fired at the alien spacecraft. However, under the attack of the most advanced weapons on earth, the ship was unscathed. However, the human counterattack angered the aliens. Their fighters attacked human planes and airports, and finally destroyed a large number of human fighters and airports.

After another round of heated discussion, people come to the conclusion that there is an invisible protective layer outside the alien spacecraft. While people were discussing how to break through the protective layer, a China pilot returned to the base and brought back an intact alien fighter. So a bold plan was born. Two skilled pilots flew the fighter plane into the alien's mother ship, destroyed the enemy's protective layer system, and then destroyed the mother ship with a high-energy particle beam.

There are still 24 hours before the deadline for aliens, and all the work is ready. Two brave pilots successfully drove an alien fighter plane into the enemy mother ship and successfully completed the task. So a beam of high-energy particles blew the alien's mother ship to pieces.

This story is of course fictional, but if there is no gravity in real life, people's life will become very difficult.