Examples of physical motion and stillness, motion and stillness in physics

2. When taking the viewing elevator to the outside, passengers rise and fall with the elevator, and the distance between the elevator and the ground and nearby scenery increases. When the elevator descends, the distance between it and the ground and nearby scenery decreases, and the elevator is used as a reference object, and the ground and nearby scenery are rising.

3. When astronauts work outside the cabin, the astronauts are stationary relative to the space shuttle and the space shuttle is stationary relative to the astronauts, because they move in the same direction at the same speed; Using the Earth as a reference, astronauts are in motion, and the space shuttle is also in motion.

4. People wave their arms on the bicycle in action, and their arms do not move relative to the human bicycle.

5. The wall clock with a pendulum is on the wall, and the pendulum wall clock does not move against the wall.

Man stands on a rotating earth, and man does not move relative to the earth.

People are on a flying airplane People don't move relative to the airplane.

The shaking key is on the walking person, and the person does not move relative to the key.

Wall clock with pendulum on the wall Pendulum wall clock does not move relative to the wall.

The person is waving his arms on the bicycle in action, and the arms are not moving relative to the person on the bicycle.

Man stands on a rotating earth.

People are on a flying plane.

The shaking key is on the walking man.

Wall clock with pendulum on the wall.

Man waving his arms on a bicycle in action.

Categories: Science & Engineering.

Problem description: There is a question in our book that says that during World War I, a French pilot was on a mission at an altitude of 2,000 meters, and was surprised to find a round object next to his face, and when he grabbed Lu Na and brought it over, he found that it was a bullet. Could something like this happen?

If he can catch the bullet, it means that the bullet is inside the planeCould it be that a bullet inside the plane would be stationary relative to the aircraft? Then it is impossible to carry a gun when the **hijacking is going to do anything, hehe.

If the bullet is outside the plane, it is impossible for the pilot to open the hatch and catch the bullet outside the plane.

Analysis: Motion and rest are what we often refer to as speed.

The velocity is the result of a comparison between the two objects, a bullet caught by a French pilot during World War I while on a mission at an altitude of 2,000 meters. It was caught outside the plane, which indicates that the plane and the bullet had similar velocities. When he caught the bullet into the plane, it could be seen as one with the plane.

So the bullets caught in the plane are stationary relative to the plane.

However, if you shoot in a flying aircraft, you will have a bullet at the same speed as the aircraft before you shoot, and you will need to add the acceleration when the bullet slides and discharges the muzzle after the shot. That is, the speed of the bullet + the speed of the plane. So the power of a bullet on an airplane is the same as that of a bullet on the ground.

Saturday, March 13, 2020 Fine.

On the surface, static and dynamic are just two words with opposite meanings. However, in the learning process, the children use stillness and movement to use each other. Therefore, if children can use movement and stillness wisely in learning, they will benefit from it for life.

Otherwise, if you can't use it reasonably, you will suffer for life in the future.

Jing can mean calm, calm, and quiet in a sense. This is not only a person's ability to deal with things, but also a realm of personal encounters. However, stillness can also be interpreted as stillness, which means that a person has no ability to move.

However, in a sense, movement is interpreted as thinking and using the brain, which is also a necessary condition for a person to be excellent. However, sometimes it can also be expressed as a person's impatience and inability to calm down. It can be seen that the praise and disapproval of stillness and movement depends entirely on whether a person buries his head in the rational use of them.

Tonight, my daughter and I used the weekend to summarize the situation of our daughter's online classes during this time. So, I talked to her about the rational use of stillness and movement in learning. When I told her that the praise and disapproval of stillness and movement depends on whether a person uses them wisely, my daughter asked me with some confusion

Dad, when should I be quiet when I'm studying? When is it time to be still? ”

After listening to my daughter's words, I smiled and said, "Actually, when the teacher is lecturing, excellent students generally keep their minds quiet, but their brains are kept moving or thinking. However, this quiet movement helped them improve their learning efficiency and achieve good results.

However, some students are a little impetuous or unable to calm down when the teacher is lecturing, and they can't think about the content of the teacher's lecture in a few books. At this point, the brain is relatively at rest. However, this movement will also greatly reduce the efficiency of their lectures, and their academic performance can be imagined.

After listening to my words, my daughter said happily: "Dad, I understand, in the future, when listening to the teacher's lectures, I will also calm down and be good at thinking, so that my classroom efficiency will become higher and higher." "Listening to my daughter's words, I feel very relieved!

Dongjin Experimental Middle School Class 77 Guo Mingdi's father.

Summary. Hello classmates, I am Teacher Yunyang, the word about physical movement and stillness: movement:

The wind is galloping, the soles of the feet are windy, the arrows are like flying, the arrows from the bow, the head is struggling, steady, the roc spreads its wings, takes off in the air, and the beautiful arc. Static words: green pine, green bamboo, verdant and dripping, slim and elegant, straight into the sky, ice clear and jade, fresh and elegant, standing tall, tall and tall, and so on.

Hello to the same track, I am Yunyang teacher, about the physics manuscript state shirt movement and static words: moving: galloping, the soles of the feet are windy, arrows are like flying, arrows from the bow, struggling, steady, Dapeng wings, soaring, beautiful arc.

Static words: curly, green pine, verdant bamboo, slim and elegant, straight into the sky, ice clear, key cavity, jade, fresh and elegant, one of a kind, towering and upright, tall and vigorous, and so on.

Hello teacher, the words I say are about ancient words, not words <>

<>Oh, can you be more specific.

The teacher didn't understand too much.

It's poetry. Poems about physical movement and stillness.

There are many of these: the quiet and fierce scum is like a clear pond, the movement is like a ripple on the branch base, the cicada noise forest is quieter, and the birdsong mountain is more secluded. Lying down and looking at the sky full of clouds not moving, I don't know that the clouds are east with me. The scenery is full of flashes, and looking at the mountains is just like walking to greet them. Look carefully at the mountains and mountains do not move, it is the boat line beam talk.

Can you do more, I'm going to do a hand-copied newspaper, don't have repetitions.

Uh-huh, okay. After the new rain in the empty mountains, the weather is late in autumn. The bright moon shines among the pines, and the clear spring stone is upstream. The bamboo noise returns to the Huannu, and the lotus moves the fishing boat. Feel free to rest in spring, and the kings and grandchildren can stay.

People are idle and osmanthus falls, and the night is quiet and the spring mountain is empty. The moonrise frightens the mountain birds, and the spring stream sings.

There is no one in the empty mountain, but there is a sound of people's voices. Return to the deep forest, and revisit the moss.

Idle living with few neighbors, grass paths into the deserted garden. The bird stays in the tree by the pool, and the monk knocks on the door under the moon. Cross the bridge to divide the wild colors, move the stones and move the cloud roots. Coming here for the time being, the tryst is worth it.

Can you give a few more examples of the actual life of movement and stillness<>

<> examples: the tanker and the oiled beam remain relatively stationary during in-flight refueling. When taking the viewing elevator to the outside, passengers rise and fall with the elevator, and the distance between the elevator and the ground and the nearby scenery increases, and the elevator is used as a reference object, and the ground and nearby scenery are falling; When the elevator of Zhenchong Bridge descends, the distance between it and the ground and nearby scenery decreases, and the elevator is used as a reference, and the ground and nearby scenery are rising.

The person is waving his arms on the bicycle in action, and the arms are not moving relative to the person on the bicycle. Wall clock with pendulum on the wall Pendulum wall clock does not move relative to the wall.

Can you name a few more <> a little bit

When astronauts work outside the cabin, the astronauts are stationary relative to the space flight and the space shuttle is stationary relative to the astronauts, because they move at the same speed in the direction of the same shot. With the Earth as the nuclear reference, the astronauts are in motion, and the space shuttle is also in motion.

Example 1: A boat drifting in the river for a feast. When using a boat as a reference, the trees on the riverbank are moving; When the cherry blossom is on the ground as a reference, the tree is stationary.

Example 2: A car driving on a road. When using a car as a reference, the items placed on the car are stationary; When the ground is used as a reference, the items in the car are in motion.

What we usually call motion and rest are both relative, both relative to an object If the position of one object has changed relative to another, we say that the first object is in motion; If there is no change in position of an object relative to another object, we say that the first object is at rest.

If you choose different objects as reference standards to study its motion, you may come to different conclusions Therefore, it is impossible to determine whether an object is moving or not without selecting a reference object in advance

Taking the car as a reference is to assume that the car is stationary, and the position of the car and the tree has changed, then it can be concluded that the tree is. Fortune. Kinetic.

Because the car is in motion when the car is used as a reference, the tree looks like it is moving from the car.