Rebirth starts from the college entrance examination

Chapter 68 Advanced Show
Tang Dou reluctantly went to the second bedroom, sat next to his sister and said, "Which one can't?"

"This option is C." Tang Tang pointed at the physics multiple-choice question with his pen, tilted his head and looked unlovable, and whimpered in his heart, why should science have physics.

"C. When a person walks forward, the friction force is backward."

Tang Dou read through the options, the person moves forward, and the friction force moves backwards. At first glance, there is nothing wrong with it. If it weren’t for the fact that he now has a champion brain, Tang Dou would be really confused. He asked his sister, “How do you determine the direction of the friction force?”

"It's opposite to the direction or trend of movement." Tang Tang answered skillfully.

"So people move forward, so the friction force is backward?" Tang Dou continued to ask.

Tang Tang nodded.

That's how she understood it, she felt that there was nothing wrong with it, and suspected that the answer was wrong.

"No matter what kind of force you study, don't rush to regard the target as a particle at the beginning, which will limit your thinking. The first step in mechanics problems is to judge the type and direction of the force. You need to study the contact surface and direction of the target and the reference object. When you figure out the size of the calculation, it can be regarded as the force decomposition of the particle drawing."

Tang Dou returned to the options, "Walking, don't worry about the direction your body is moving forward. The friction force of walking is definitely produced by the contact and extrusion of the soles of the feet with the ground, so you have to study the soles of your feet."

"Actually, the soles of a normal person's feet do not slide relative to the ground when they walk. They jump up, jumping up, so it's static friction. Can you imagine this?" Tang Dou said, sliding his palm on the table.

Tang Tang nodded with her mouth open. It turned out that she had mistaken the type of friction. No wonder the more she reasoned, the more chaotic.

"This is why you couldn't judge before. Static friction is a little more complicated than dynamic friction. It can stop power supply. You can move forward because of this. Also, the car is subject to both dynamic and static friction while moving forward. Static friction Provide power, kinetic friction is resistance, and you will experience it later.” Tang Dou raised his hand:

"Stand up and take two steps, slow down."

The old girl stood up obediently.

Walk towards the door, one step, two steps.

"Don't look at your feet, use your brain to feel." Tang Tang stepped forward with his left foot, and just raised his right heel, Tang Dou shouted: "Stop, feel the movement trend of your right foot."

"The soles of the feet are pushed backward, so the static friction is forward. It's so simple. I used to always grasp the target and analyze it as a whole." Tang Tang suddenly realized that her mind was muddled about the force analysis, but it was clear after being explained by brother Yitong. clear.

"I thought you were really lucky in the college entrance examination." Tang Tang said with a smile, brother is hiding something, and the topic is very simple and vivid.

"If you don't have something in your head, you can try to touch [-] points." Tang Dou rolled his eyes, "The friction force of a car is often tested, can you judge clearly now?"

"Yes." Tang Tang nodded vigorously.

"Okay, it's only been a long time since the first year of high school, and I haven't learned much knowledge. It's enough to figure out the friction force today. Let's play." Tang Dou advised his sister.

"I made the notes." Tang Tang opened his notebook and wrote quickly.

Chen Yun in the hall was upset again, there is no brother who persuaded his sister not to follow suit, he didn't care at all.

"Dou Dou is right. Tang is only a freshman in high school now. Let it be fun during the holidays. You don't learn too much every day. It's enough to figure out a knowledge point. Moreover, Tang is very conscious. Don't force her all day long." Old Tang advises Shen Yun.

Of course Shen Yun knew how to combine work with rest, so she asked her daughter to learn formation in the morning.

"Brother, let's play Fighting the Landlord." Tang Tang finished his notes and said.

"Wait a minute, are you running every day?" Tang Dou was finishing the daily task.

"Mom won't let me. I'm only allowed to play Landlords at home, and I'm not allowed to bring a smartphone at school." Tang Tang said in a low voice, and then said: "The school doesn't let me play with mobile phones. Teacher Mu was promoted to the director of teaching affairs this year. strict."

"He has always been very strict. He was only strict with his own class before."

Mu Jinhua's strict Tang Dou certainly knows that Han Wentao is also a good student in front of him.

On October [-]st, Tang Dou would rather stay at home and read a book than go outside, but the old girl had a rare holiday, so he took her for a tour around the city, and invited Mu Wanying to go with her after lunch.The three of them went to Datang Paradise first.

Tang Dou and Mu Wanying have half-price tickets with student ID cards, and half-price tickets for Tang Tang's minors with ID cards.

Datang Furong Garden is suitable for roaming. There are pavilions, gardens, waterfalls, lakes, and streams. You can bring some food and drink, and you can walk and sit in groups in small groups, leisurely.

In this golden autumn in October, the sky is high and the clouds are light, and the coolness in the wind wipes out the autumn tiger.

Tang Tang and Mu Wanying were chatting and laughing in front of him. There was basically nothing wrong with Tang Dou. Behind Tang Dou, he was playing with his mobile phone leisurely. A foreigner asked him to take pictures in a foreign language. Tang Dou understood, took the camera and took a few clicks open.

"Thank you very much." The foreigner thanked repeatedly.

"You're welcome, wish you a good trip." Tang Dou replied simply and smoothly.

"Thank you, goodbye." The foreigner said goodbye in broken Chinese.

Mu Wanying and Tang Tang were surprised in front, and Mu Wanying said: "I didn't realize that Doudou's spoken language is so good."

"Isn't this the most daily communication? I always pay attention to practicality in my studies. If I fail you in the exam, my oral English may not be worse than yours." Tang Dou pretended to be big.

Mu Wanying was so embarrassed, she was good at English, but Tang Dou stomped on her.

"Brother, you are almost ready. Except for Chinese, there is nothing better than Sister Wanying." Tang Tang immediately poured a basin of cold water.

Tang Dou felt ashamed, and his language was higher than Mu Wanying's.

"What happened last night? I was reprimanded by your mother as soon as I got back." Mu Wanying asked Tang Dou.

"My mother thought I betrayed you, so she insisted on severing parent-child relationship with me." Tang Dou.

Mu Wanying was about to say ghost letters, but she changed her words, "It's that exaggerated."

"My mother is really angry, and she has saved my brother's anger for a few days." Tang Tang briefly talked about Mi Le's gift.

Mu Wanying looked at Tang Dou with a smile and said, "That 'rice' in your class, she wanted to give me 100 million last night to let me leave you. I think it's a good deal to get 100 million for nothing, and I'm considering it."

"It seems that I am worth more than you. Han Wentao once gave me 50 yuan in the second year of high school to let me leave you."

Tang Dou smiled lightly.

Mu Wanying was a little annoyed that Han Wentao actually disgusted her behind her back. This is like Han Wentao, a rich second generation who likes to throw money at people. Mu Wanying asked:
"Then why don't you agree?"

"I think you still have room to appreciate. Before the age of 25, if you take good care of it, it will increase steadily before the age of 30. It will be worth at least 200 million after you graduate from college." Mu Wanying bit her lip and kicked Tang Dou, Tang Dou said again :

"In my case, 100 million can be sold, and there is no such shop after passing this village."

The students are called Tang Dou Han Dou, but in fact they belong to a group of Tang Dou Jing.

To be reasonable, although Tang Dou and Mu Wanying were stumbled after marriage in the previous life, it cannot be denied that Mu Wanying is a good wife. It is definitely a blessing to marry 50 yuan. Of course Tang Doubai married, and Mu Wanying's parents even accompanied the suite.

"You are narcissistic, I haven't decided whether I want to buy you or not." Mu Wanying turned her head, so arrogant, she suddenly turned around and said, "How did you answer Han Wentao back then?"

"If I ask Han Wentao to throw a bag of money at you, I might succeed." Tang Dou.

Mu Wanying smiled and said nothing, squatting by the pool to watch the carp in the water.

Brother and sister Wanying are high-level shows.Tang Tang felt like he had made a light bulb.

After visiting the Tang Furong Garden, I went out to watch a movie, and then went to the Big Wild Goose Pagoda after dinner. The Big Wild Goose Pagoda is really good at around [-] o'clock in the evening. The beautiful ladies in Tang suits and Hanfu are really eye-catching.

There will be a musical fountain later, and the fountain will bloom with the melody of I love your motherland, which is very exciting.

PS: Ollie for the college entrance examination.

(End of this chapter)