Why did apples fall down? Why did apples fall

When the apple is ripe, the gravitational pull of the earth will naturally fall on its own.

Newton sat under the apple tree when the apple fell on his head. Newton was inspired to discover the law of gravitation. This is a story that children of several years old know, and almost all of them describe Newton's discovery of the law of gravitation.

However, according to Hong Kong's "Ta Kung Pao" 20**, according to a manuscript recently published by the Royal Society, the bridge of Newton being hit by an apple seems to be a legend made up by later generations.

Apples fall due to gravity.

Why do apples fall" describes the problem of a classic story in physics about the discovery of the law of gravitation.

There is a certain gravitational force between the apple and the earth, and when the apple is ripe, the gravitational force is greater than the supporting force of the apple branches and leaves, so it has a tendency to fall and eventually fall to the ground.

Hello dear, very high bend years to answer your <>

When the Apple phone slides down, it turns to the top because the screen sensitivity of the iPhone is too high. You can adjust the screen sensitivity by setting "Screen Adjustments" in the center. Here's how:

1. First click the "Settings" icon on the desktop of your iPhone to enter the settings page of your iPhone. 2. In the settings page of the Chong Rock iPhone, find the setting item "General" and click to enter the general settings page. 3. In the general settings page, click to select "Accessibility" to enter the accessibility page.

4. In the accessibility page, find the setting item of "Touch Adjustment", click to enter the Scattered Touch Adjustment Operation Page 5, in the "Touch Adjustment" page, you first need to switch the function switch in the page to adjust the screen parameters 6, after turning on the "Touch Adjustment" function, you can adjust the sensitivity of the screen according to the actual situation of the screen<>

Newton was first proposed from this phenomenon"Gravitation says"Because the apple tree grows on the earth, according to the definition of gravitation, there is gravitational force between the two objects, but the size is different, then the gravitational force has a lot to do with the distance between the two objects, because the apple tree grows on the earth, the height of the apple hanging is relative to the sky, obviously it will be much closer to the earth, so the gravitational force between the apple and the earth is much larger, so once the apple is separated from the tree, it will be controlled by a much larger force, and it will naturally fall to the ground. And not to the sky.

Try to think about it, if you don't take into account the gravitational attraction between the Earth and Jupiter, and think that the Earth and Jupiter can be stationary at the same time at very close distances, then when Jupiter is very close to the apple, the apple will definitely fall on Jupiter instead of the ground after it breaks away from the tree.

For example, if Mercury is brought closer to the Earth, and the interaction between Mercury and the Earth is not considered, then the apple will still fall on the Earth, not on Mercury.

This is the most common phenomenon in life: when the apples on the tree are ripe, they will naturally fall. Curious children often ask, why did the apple fall?

Why not fly up, or drop in the other direction? Anyone with a little knowledge of physics will explain that it is the effect of the earth's gravity.

On Earth, everything is subject to gravity. In the space around the Earth, any object that does not have a force opposite to gravity to support it will fall towards the center of the Earth. The force that is applied vertically downward by an object due to the attraction of the earth is called gravity.

We live on Earth and deal with gravity all the time. For example, an irregular piece of cardboard, where can it be perforated and threaded to lift it smoothly? The crane is ready to lift the thick steel pipe on the large flat car, and the hook should be hoisted at **?

To solve these problems, it is necessary not only to know the force, but also to think about where the force should be used. Through experiments, you will find that to lift the cardboard, the line needs to pass through the center of the circle; rectangular and parallelogram cardboard, as long as you find the intersection of the diagonals, you can lift it up lightly; The triangle finds the intersection of the three middle lines to solve the problem.

It turns out that everything has a center of gravity. The gravitational pull of the Earth acts at this point.

The center of gravity is not only the point of action of the earth's force on the object, but also has a great deal to do with the stability of the object: the lower the center of gravity, the greater the stability. If the center of gravity is lower than the support point, the object is more stable.

The real reason for the falling object from the sky is the attraction of the center of the earth. Since the earth is an object with a large volume and mass, the volume and mass of apples and the like are negligible compared to the earth, which is equivalent to one.

Particle. Because of gravity, the apple falls towards the center of the earth. As for how to calculate the resistance it is subjected to, first of all, we need to figure out where the resistance is generated, and for the specific problem of apples falling to the ground, it's.

The drag comes from the gravitational pull of other objects on the apple, such as airplanes in the sky, animals on the ground, and even celestial bodies in outer space, but these are small compared to the gravitational force of the earth, and they can be ignored. But.

There is a case that excludes the force generated by the movement of the air flow on the apple, which can change the trajectory of the apple when it falls, but it should be counted in the resistance of the apple. So the drag force and gravity are not equal.

Excerpt from netizens, thank you.

Earth's gravity, Newton said, not me.

Apples are the fruits of the apple tree that are produced by the apple tree in order to reproduce their offspring. The ovary of the flower develops into a pulp, which plays a protective role in order to prevent the seeds from being accidentally injured. When the seed is ripe, it signals to the apple tree, and the apple tree stops providing nutrients to the apple, and the pedicle will lack nutrients and shrink, and it will fall off when it can't stand the weight of the apple.

The physical explanation is: the apple is affected by the pull of the fruit tree and the gravitational force of the earth (gravity), when its gravity is greater than the gravitational force, the resultant force of the apple is downward, with downward acceleration, the apple moves downward, the pull force of the fruit tree on the apple becomes 0, and the apple is affected by gravity and air resistance in the process of falling, and the air resistance is very small and negligible, so the apple will accelerate downward.

Because apples are taller than the ground, they are affected by gravity in technical terms.

Because it's going to smash Newton's head!