How to compare the force
Publish: 2021-05-29 00:54:45
1. Yes, the pages inside and outside the tube are poor
2.
F1=Ftanθ=100*4/3=400/3
F2=F/cosθ=100/0.6=500/3
3.
The calculation formula of elastic force: F = KX, K is called stiffness coefficient of spring (also known as stubborn coefficient or elastic coefficient), which is equal to the elastic force when the spring extends (or shortens) unit length. The unit is Newton per meter and the symbol is n / m
The value ofk is related to the properties of the material. The difference between the soft and hard springs means that their stiffness coefficients are different. And the stiffness coefficients of different springs are generally different. The negative sign in the above expression indicates that the force proced by the spring is opposite to its extension (or compression) direction
Elastic definition: the shape or volume change of an object under the action of force is called deformation. When the external force stops acting, the deformation that can be recovered is called elastic deformation. In order to restore the original state of a deformed object, it is necessary to exert a force on the object in contact with it. This effect is called elasticity. That is, within the scope of elastic limit, the force proced by an object to the applied force that deforms the object is called elastic forcethe interactions observed in daily life, whether they are pushing, pulling, lifting, or pulling trains, forging workpieces, hitting balls, bowing and archery, all occur when objects contact with each other, which can be called contact force. According to its nature, contact force can be summarized as elastic force and friction force, which are essentially caused by electromagnetic force
Elastic force is a kind of contact force, which can only exist in the place where objects contact each other, but it doesn't necessarily have the effect of elastic force between objects that contact each other. Because the generation of elastic force not only needs contact, but also interactionthe elastic force is proced between the objects which are in direct contact and have elastic deformation. Generally speaking, pressure, supporting force and pulling force are elasticity. The direction of elasticity is always opposite to the direction of deformation. The direction of pressure or supporting force is always perpendicular to the supporting surface and points to the pressed or supported object
Generally speaking, the pulling force is also elastic. The pulling force of the rope is the elastic force of the rope to the object pulled. The direction is always along the rope and points to the direction of the rope contraction4. Lotus in the water, graceful and graceful
caihang hangs down the poplar and goes deep into the lotus. Smile, but the center is bitter.
caihang hangs down the poplar and goes deep into the lotus. Smile, but the center is bitter.
5. 1. Walk about 480 meters from Jiubao passenger transport center to the passenger transport center station
2. Take subway line 1, pass 14 stops to Wujiang Road Station
3. Walk about 590 meters to Jinjiang Village Station
4. Take bus 39, pass 20 stops to Xiangshan station
5. Walk about 150 meters to dazhusi road
2. Take subway line 1, pass 14 stops to Wujiang Road Station
3. Walk about 590 meters to Jinjiang Village Station
4. Take bus 39, pass 20 stops to Xiangshan station
5. Walk about 150 meters to dazhusi road
6. All the trains from Hangzhou to Lishui depart from Hangzhou south bus station, but there is no bus from Jiubao passenger transport center to Lishui
departure time: 07:00, 07:55, 08:50, 09:20, 10:00, 10:30, 11:00, 11:30, 11:50, 12:15, 12:40, 13:10, 13:15, 13:45, 14:10, 14:40, 15:20, 15:45, 16:20, 16:50, 18:30
the ticket price is 120 yuan
departure time: 07:00, 07:55, 08:50, 09:20, 10:00, 10:30, 11:00, 11:30, 11:50, 12:15, 12:40, 13:10, 13:15, 13:45, 14:10, 14:40, 15:20, 15:45, 16:20, 16:50, 18:30
the ticket price is 120 yuan
7. Jiubao bus directly to Zhoushan Shenjiamen, get off to the bus stop at the gate of the station, take Shenjiamen - Zhujiajian bus or Shenjiamen - Lover island. The most convenient thing is to take a taxi, but the price is a little higher
8. Sun Chuo, a good friend of Wang Xi in the Eastern Jin Dynasty, wrote a Ode to mount Tiantai, which showed the high-grade natural and cultural landscape of Mount Taiyue to the world for the first time; In the autumn of 429 ad, the poet Xie Lingyun personally led a large tourist group with hundreds of people. Starting from Shengzhou, he cut down the mountains and opened the way to build a tourist route to Vietnam and Taiwan. So it's a classic route with nearly 1600 years of history.
9. Chapter 1: a spiritual tour of Jiuqu River
people say that when we go to Wuyi, "if we don't go to Tianyou, we're going to travel in vain." it's true. When my friends and I spent two hours climbing on Tianyou peak, I gasped for breath and looked around at the pavilion of Tianyou peak. The peaks were emerald, the rocks were steep, the nine curves were winding, and the bamboo rafts swayed gently. Then I knew that the mountains were winding and the water was flowing, Wuyi landscape panoramic view, deep breathing, open-minded people, forget to return
Xu Xiake once said, "it is not near the stream, but can make the best of nine tunes. This peak should be the first one." at that time, I thought that the beauty of Wuyi Mountain was worthy of Tianyou peak. Standing on the top of the peak and watching the beautiful mountains and waters, it was in line with my dream of being a hero in the river and lake. With a sword on my back, I played a song "Xiaoao River and lake", I'm afraid it's the most beautiful thing in the world
free from the hustle and bustle of the city, I don't have to think about the boring work and gloomy life, and I don't have to work like a machine in a hurry, which makes me sleepy and tired. I can't cheer up even when I'm happy, and my mind seems to be panting for lack of oxygen People don't need to disguise themselves in front of nature. They just want to sing a song when they see the mountains and water. The green water often revolves around the green mountains. Thinking about the Jiuqu drifting tomorrow morning, they are full of endless yearning
in the early morning of the next day,
when the clouds were still around the peaks in the early morning, when the cool autumn was blowing on our cheeks, we had already lined up to sit on the bamboo raft. The boatman gently touched the long pole, and the bamboo raft cut through the water, facing the slightly cool river wind. We couldn't help closing our eyes to feel the comfort of our hearts, without a trace of boredom and depression, How long has not breathed so fresh air, the whole heart is like empty, spacious, washed pure
before I came here, I had heard that Jiuqu River is the most beautiful of Danxia blue water Wuyi Mountain. If Tianyou peak is a dangerous and bold chivalrous wind, Jiuqu, which is like smoke and fog in the morning, is undoubtedly a beautiful Jiutian fairy. Bamboo rafts are flowing down the river. The mountain is standing along the water, and the water turns with the mountain, meandering along Jiuqu 18 Bay. There is a paradise hidden among the mountains, and the Ziyun academy is hidden behind the bamboo forest. No wonder Guo Moruo's poems are as follows: Lingbo floats on the rafts and flies to the clouds, and he can write poems even if he can't write them
the bamboo raft is facing the autumn water, and we are facing the cool wind in the early autumn. We are moving forward in a kind of near fairyland romance. There is a poem that says: if there is no trouble in the heart, it is a good time in the world. I think that kind of good time will be blushing if compared with my nine turns of boating, and the clear water of my close relatives is incomparable, Looking up at the cliffs on both sides of the Strait and the boat coffins inserted in them after thousands of years of wind and sun, the layers of peaks rise and fall one after another, and the ancient temples and Taoist temples are hidden in them, so that we who have been living in the city for a long time can really experience the relaxed and comfortable life. This is the real good time of the world
the two boatmen, one in front of the other and the other in the back of the boat, explained many beautiful legends about Jiuqu to us as they went along with their pole. The beautiful love stories of Dawang peak and yunnv peak have been handed down through the ages. Zhu Xi's handwriting of "passing away like this" is still vivid. In their lovely eyes, every mountain peak and every strange stone are recognized by them according to their shape and characteristics, It gives a proper name to make people laugh. In their vulgar words, we realize their unique humor and kindness, which makes us laugh and laugh all the way. The nine twists and eighteen bays are behind us
looking back at the clear water, green mountains and white sky, my heart is as clear as water, and I want to drift along with the bamboo raft. The happy world is always so short, but I remember the happiness and treasure it in my heart<
Lin'an Daming Mountain
Lin'an Daming Mountain, known as xiaohuangshan, is a poem written by Emperor Xuanzong of Tang Dynasty. How can streams stay? The sea will be the waves after all. Along the road has revealed beautiful, mountains, valleys, streams, huge boulders, winding mountain road, familiar, still happy
tourists gather in a chic wooden corridor at the entrance to wait for the bus. On the side is the turbulent stream, the cliffs that need to be lifted, the divided blue sky, the bright white clouds, the mountain road in front, the tall trees, the green leaves flickering in the sun, the slightly chilly autumn wind sending green oxygen, a small valley, a unique space
the bus put us down at Longmen gorge, which is the starting point of climbing. Just a few steps away, I saw Zhu mianshi. It is said that Zhu Yuanzhang once had a rest on the ten meter long stone, which gave the stone a common name. The drop of stone height forms a small waterfall, a small pool more than one meter deep. Gazing at the clear water, there is a kind of peace of mind
along the way, accompanied by streams and lush trees beside the stone steps, you can see the mountains near and far through the valley, which are stacked in layers. The mountains in autumn are dotted with deep and shallow green and yellow, and the two basic colors can also present colorful colors. When I look back, I can even look at the mountains in the distance. The stream beside me is still dingdong, which is very unique. Graally into the top of the mountain, next to the Jia Road, a pine tree emerges. On the opposite side of the mountain, a steep rock like a knife is exposed, with a few big characters engraved, showing the romance of famous mountains in ancient poetry
at the turning point of the mountain road, there is a big yellow tree in the middle of the three green hills, like a spirit falling into the world. Gave me a surprise. Looking up and climbing closer, this tree is called "Queen tree", which is related to empress Xiao. There is a slender waterfall about 10 meters high beside the tree, which makes it interesting<
climbing from the mountain to the top, standing on the peak with an altitude of more than 1400 meters, you suddenly see light. The 100m cable-stayed bridge of Longmen ferry crosses between the two huge rocks on the top of the mountain. Under the bridge is a waterfall with steep slope. On the other side of the bridge is a thousand mu meadow, a plain on the top of the mountain. Left and right comparison, beyond the secular imagination. It's really a blessed place. There are both dangerous terrain to block the enemy and fertile soil to cultivate grain. It's not clear whether Daming Mountain made Zhu Yuanzhang or Zhu Yuanzhang made Daming Mountain
there are people living next to the thousand mu meadow. The owner's dog is very friendly and teases the dog at will. Three round little guys come here with their tails wagging. They are so simple and lovely. Looking at their eager eyes, I can't help but feel sorry. I only have cake on my body. They like it very much. Reluctantly followed us for more than 200 meters<
standing on the top of the mountain, I can see the seven peaks of Mingfei from the trees. There are some beautiful people from Zhangjiajie. In the distance, the continuous mountains, layer by layer, such as ink landscape, graally blurred and faded away. The sky is high and quiet. I wish I could live in seclusion and disappear here
it was getting dark, so I chose the cableway when I went down the mountain. There are two viewing platforms in the long and cold road. Looking for light from the dark place, there was a thin light on the ground. Looking up, it was a line of sky more than 30 meters high. One step from the dark into the bright world, this is the cliff stone platform, facing the mountain surrounded Yubi peak, quiet leisurely, like a fairyland. The other is the driving platform, because it's very cold, so let it go. Friends said that leaving some regrets can be used as an excuse to revisit. That's right
after getting on the bus in the scenic spot, you can feel the & lt; Prefix D & gt; I'm happy. The tour guide had introced the superb skills of the drivers before, but when they came, they didn't feel much about the upward journey, but the downward return journey was really beyond the concealment of the best flying car. The passengers on the same car yelled, "this is much more fun than the carnival!". This is what I think of as a unique feature of Daming Mountain.
people say that when we go to Wuyi, "if we don't go to Tianyou, we're going to travel in vain." it's true. When my friends and I spent two hours climbing on Tianyou peak, I gasped for breath and looked around at the pavilion of Tianyou peak. The peaks were emerald, the rocks were steep, the nine curves were winding, and the bamboo rafts swayed gently. Then I knew that the mountains were winding and the water was flowing, Wuyi landscape panoramic view, deep breathing, open-minded people, forget to return
Xu Xiake once said, "it is not near the stream, but can make the best of nine tunes. This peak should be the first one." at that time, I thought that the beauty of Wuyi Mountain was worthy of Tianyou peak. Standing on the top of the peak and watching the beautiful mountains and waters, it was in line with my dream of being a hero in the river and lake. With a sword on my back, I played a song "Xiaoao River and lake", I'm afraid it's the most beautiful thing in the world
free from the hustle and bustle of the city, I don't have to think about the boring work and gloomy life, and I don't have to work like a machine in a hurry, which makes me sleepy and tired. I can't cheer up even when I'm happy, and my mind seems to be panting for lack of oxygen People don't need to disguise themselves in front of nature. They just want to sing a song when they see the mountains and water. The green water often revolves around the green mountains. Thinking about the Jiuqu drifting tomorrow morning, they are full of endless yearning
in the early morning of the next day,
when the clouds were still around the peaks in the early morning, when the cool autumn was blowing on our cheeks, we had already lined up to sit on the bamboo raft. The boatman gently touched the long pole, and the bamboo raft cut through the water, facing the slightly cool river wind. We couldn't help closing our eyes to feel the comfort of our hearts, without a trace of boredom and depression, How long has not breathed so fresh air, the whole heart is like empty, spacious, washed pure
before I came here, I had heard that Jiuqu River is the most beautiful of Danxia blue water Wuyi Mountain. If Tianyou peak is a dangerous and bold chivalrous wind, Jiuqu, which is like smoke and fog in the morning, is undoubtedly a beautiful Jiutian fairy. Bamboo rafts are flowing down the river. The mountain is standing along the water, and the water turns with the mountain, meandering along Jiuqu 18 Bay. There is a paradise hidden among the mountains, and the Ziyun academy is hidden behind the bamboo forest. No wonder Guo Moruo's poems are as follows: Lingbo floats on the rafts and flies to the clouds, and he can write poems even if he can't write them
the bamboo raft is facing the autumn water, and we are facing the cool wind in the early autumn. We are moving forward in a kind of near fairyland romance. There is a poem that says: if there is no trouble in the heart, it is a good time in the world. I think that kind of good time will be blushing if compared with my nine turns of boating, and the clear water of my close relatives is incomparable, Looking up at the cliffs on both sides of the Strait and the boat coffins inserted in them after thousands of years of wind and sun, the layers of peaks rise and fall one after another, and the ancient temples and Taoist temples are hidden in them, so that we who have been living in the city for a long time can really experience the relaxed and comfortable life. This is the real good time of the world
the two boatmen, one in front of the other and the other in the back of the boat, explained many beautiful legends about Jiuqu to us as they went along with their pole. The beautiful love stories of Dawang peak and yunnv peak have been handed down through the ages. Zhu Xi's handwriting of "passing away like this" is still vivid. In their lovely eyes, every mountain peak and every strange stone are recognized by them according to their shape and characteristics, It gives a proper name to make people laugh. In their vulgar words, we realize their unique humor and kindness, which makes us laugh and laugh all the way. The nine twists and eighteen bays are behind us
looking back at the clear water, green mountains and white sky, my heart is as clear as water, and I want to drift along with the bamboo raft. The happy world is always so short, but I remember the happiness and treasure it in my heart<
Lin'an Daming Mountain
Lin'an Daming Mountain, known as xiaohuangshan, is a poem written by Emperor Xuanzong of Tang Dynasty. How can streams stay? The sea will be the waves after all. Along the road has revealed beautiful, mountains, valleys, streams, huge boulders, winding mountain road, familiar, still happy
tourists gather in a chic wooden corridor at the entrance to wait for the bus. On the side is the turbulent stream, the cliffs that need to be lifted, the divided blue sky, the bright white clouds, the mountain road in front, the tall trees, the green leaves flickering in the sun, the slightly chilly autumn wind sending green oxygen, a small valley, a unique space
the bus put us down at Longmen gorge, which is the starting point of climbing. Just a few steps away, I saw Zhu mianshi. It is said that Zhu Yuanzhang once had a rest on the ten meter long stone, which gave the stone a common name. The drop of stone height forms a small waterfall, a small pool more than one meter deep. Gazing at the clear water, there is a kind of peace of mind
along the way, accompanied by streams and lush trees beside the stone steps, you can see the mountains near and far through the valley, which are stacked in layers. The mountains in autumn are dotted with deep and shallow green and yellow, and the two basic colors can also present colorful colors. When I look back, I can even look at the mountains in the distance. The stream beside me is still dingdong, which is very unique. Graally into the top of the mountain, next to the Jia Road, a pine tree emerges. On the opposite side of the mountain, a steep rock like a knife is exposed, with a few big characters engraved, showing the romance of famous mountains in ancient poetry
at the turning point of the mountain road, there is a big yellow tree in the middle of the three green hills, like a spirit falling into the world. Gave me a surprise. Looking up and climbing closer, this tree is called "Queen tree", which is related to empress Xiao. There is a slender waterfall about 10 meters high beside the tree, which makes it interesting<
climbing from the mountain to the top, standing on the peak with an altitude of more than 1400 meters, you suddenly see light. The 100m cable-stayed bridge of Longmen ferry crosses between the two huge rocks on the top of the mountain. Under the bridge is a waterfall with steep slope. On the other side of the bridge is a thousand mu meadow, a plain on the top of the mountain. Left and right comparison, beyond the secular imagination. It's really a blessed place. There are both dangerous terrain to block the enemy and fertile soil to cultivate grain. It's not clear whether Daming Mountain made Zhu Yuanzhang or Zhu Yuanzhang made Daming Mountain
there are people living next to the thousand mu meadow. The owner's dog is very friendly and teases the dog at will. Three round little guys come here with their tails wagging. They are so simple and lovely. Looking at their eager eyes, I can't help but feel sorry. I only have cake on my body. They like it very much. Reluctantly followed us for more than 200 meters<
standing on the top of the mountain, I can see the seven peaks of Mingfei from the trees. There are some beautiful people from Zhangjiajie. In the distance, the continuous mountains, layer by layer, such as ink landscape, graally blurred and faded away. The sky is high and quiet. I wish I could live in seclusion and disappear here
it was getting dark, so I chose the cableway when I went down the mountain. There are two viewing platforms in the long and cold road. Looking for light from the dark place, there was a thin light on the ground. Looking up, it was a line of sky more than 30 meters high. One step from the dark into the bright world, this is the cliff stone platform, facing the mountain surrounded Yubi peak, quiet leisurely, like a fairyland. The other is the driving platform, because it's very cold, so let it go. Friends said that leaving some regrets can be used as an excuse to revisit. That's right
after getting on the bus in the scenic spot, you can feel the & lt; Prefix D & gt; I'm happy. The tour guide had introced the superb skills of the drivers before, but when they came, they didn't feel much about the upward journey, but the downward return journey was really beyond the concealment of the best flying car. The passengers on the same car yelled, "this is much more fun than the carnival!". This is what I think of as a unique feature of Daming Mountain.
10. Because the tourist service center only has the function of service, but the tourist center has many functions, such as service, transfer, ticket selling, leisure, inquiry, shopping and so on
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