Gu Tiancheng's departure was half a day,

For this reason, a trace of guilt flashed in Xu Anran's heart, but it was only for a moment, and she was pulled away by other things......

Halfway through the last class, the phone in her pocket suddenly vibrate.

Seeing the teaching director talking in front of the blackboard, she couldn't refute his face, so she raised her hand and asked for leave to go to the bathroom.

Looking at the button text message on the screen, her brows furrowed deeply.

She was in a trance for a long time before she replied firmly: "I'm fine. Do not worry！ Then he slowly put away his phone.

walked into the classroom with a solemn face.

Jasven couldn't help but feel a little embarrassed when he looked at Xu Anran, who had suddenly changed his appearance, and had been distracted since he returned to the classroom.

Although she has good grades, she can't get used to her problem, so she ......

"Xu Anran, you can answer the content of the textbook we reviewed today!"

Hearing his name called, Xu Anran suddenly woke up from his contemplation.

"Newton's Third Law." Xu Anran stood up and said indifferently.

Jasven nodded with relief.

"What are the main aspects, can you tell me more about them?"

Xu Anran looked up at a smile on his face, but his eyes flashed with a stern Jasvin. I also felt a little guilty in my heart.

"The force of action and reaction between two objects is always on the same line at the same time, equal in magnitude and opposite in direction.

i.e. F1=-F2(N=N')

It is divided into five steps.

(1) The action of force is mutual. Appears at the same time and disappears at the same time. This is like two people fighting each other, the force is generated when they are in contact, and they disappear when they are separated.

(2) The interacting force must be a force of the same nature. This is like an attack by one side, and at the same time he gets the rebound impact emitted by the body of the attacker.

(3) The action force and the reaction force, acting on two objects, cannot cancel each other out. This is like one running and the other chasing, never able to walk side by side.

(4) The action force can also be called the reaction force, but the reference object selected is different. This is like people walking in opposite directions back to back, except for the different target positions, the goal is the same.

(5) The action force and the reaction force cannot be found because the application point is not on the same object. This is like two people carrying sandbags, except to go to the destination, in order to let go of the burden, no one can help anyone!

Teacher Jia, is it okay for me to explain it like that? ”

Xu Anran finished speaking in one breath and looked at the teacher expressionlessly.

Jasven looked at her in shock, and after a few seconds of stunnedness, his head clicked like a wave.

"It's very vivid, this explanation, it must be understandable to everyone, simple and rude, but it is also elegant, okay! Sit down! ”

Jasven sighed, how can such a delicate and feminine girl have a violent tendency even in a physical description.

￥

Lunch time,

Xu Anran still sat quietly in the corner, bowing his head and enjoying the food.

After only two bites, a plate was placed on the opposite side.

Then a figure with an open school uniform crashed into view.

"Someone is sitting here, please go elsewhere." Xu Anran said indifferently without raising his head.

"Don't! I'm a big admirer of yours, and it's not good for you to just drive me away! ”

The boy's arrogant voice made Xu Anran a little annoyed.

“……”

"This is my place."

Before he could speak, a familiar and domineering voice sounded behind him......