Xueba, I beg you to go and escort him quickly!

about the acceleration of the Earth's rotation.

Xu Heng and Fang Zhonggui chatted a lot.

Between them, it can be described as having a happy conversation!

As for Dean Nie, he was very depressed.

After communicating with the principal, the principal's attitude is to let Dean Nie fight for it.

fight?

How to fight for this?

Just steal someone from Wen Ruohuai and the Lu family!

But what about the Institute of Physics?

Moreover!

Peking University has always been in a very disadvantaged position.

After all, tomorrow Xu Heng will help them prepare the examination papers for the postgraduate entrance examination at Peking University.

They have plenty of time to spend together!

This is even less reason to entangle with the research institute.

But Peking University has the position of Peking University!

The research institute has the position of the research institute!

Wen Ruohuai and the Lu family are in their mood again!

Dean Nie sighed, "It's a crime... hey..."

Putting down the phone, Dean Nie had a headache.

"It's even more difficult than being the dean of Peking University's School of Physics in the first year."

"hiss……!"

Both Xu Heng and Fang Zhonggui looked at Dean Nie.

"What do you mean? Dean Nie?"

Dean Nie said bluntly, "Student Xu Heng, now the three parties are trying to fight for you, so please tell me what to do!"

"What's your attitude?"

Fang Zhonggui, "Three parties? What do you mean?"

Dean Nie, "The principal hopes to invite Xu Heng tonight, as a landlord, and also to express his gratitude to Xu Heng."

"In addition, the Institute of Physics also wants to entertain Xu Heng tonight, and apologizes."

"There are also Wen Ruohuai from the business district, and the Lu family..."

Dean Nie took a deep breath, "Wen Ruohuai and the Lu family are actually fine...they..."

Fang Zhonggui, "Dean Nie! They shouldn't be very good, right? It's said that they will invest a lot of advanced equipment in Peking University recently..."

Dean Nie, "%￥#￥%￥￥..."

Fang Zhonggui, "In addition to chemistry, biology, etc., it is also involved in our house."

Dean Nie, "..."

Hemp egg!

No one can afford to offend!

"How come I don't know about this news?"

"Hiss... No! No wonder the principal didn't say anything to me!"

Emotions still have this layer of relationship.

Fuck it!

!!!

Dean Nie found this matter more and more difficult.

Dean Nie frowned, "Why is it just today! Can't it be next time? They're clearly trying to make things difficult for me! Hey..."

"Student Xu Heng, what kind of attitude do you have?"

Xu Heng looked at Dean Nie and Fang Zhonggui who looked expectant, and smiled, "No attitude at 157 degrees."

"I don't know how to choose."

"After all, they are all dignified existences."

"I just have to go with the flow."

Xu Heng's meaning is very clear, the three parties, each according to their own abilities.

He knew very well that they would not do anything to themselves, but that there was a need to balance the three parties.

This is not something he has to consider, so it is not something he should worry about.

"Professor Fang, shall we continue?"

Fang Zhonggui smiled, "Okay, okay!"

Withdrawing physics from earth research, anyway, the topic of the two people has been constant.

Fang Zhonggui, "Student Xu Heng, with your inspiration, I can change this question like this!"

As shown in (a) (b), there is a small sled with mass m=1kg on a wooden board with mass M=0.1kg.

The motor on the sled pulls a rope, which makes the sled move at a speed of V0=0.1m/s.Ignore the friction between the table top and the board.

The coefficient of friction between the board and the sled is μ=0.02.

Hold the board and start the motor.

When the sled reaches speed V0, let go of the board.

At this instant, the distance between the sled and the end of the plank is L = m.

The rope is attached to (a) the distant stake, (b) the end face of the target.

Describe the motion of the board and sled in two situations.

When does the sled reach the end of the plank?

Xu Heng was very interested in this question, but turned around and posted it in the group.

Fang Zhonggui, "???"

"Student Xu Heng, I haven't covered this question yet!"

Because the changes are relatively large, Fang Zhonggui has not had time to revise the answer by himself, and there is still verification!

It was sent out by Xu Heng.

Xu Heng smiled, "Professor Fang, don't worry! I've read it for you! It's no problem!"

Fang Zhonggui was shocked!

If Xu Heng came up with the questions quickly, it meant that he was well prepared and prepared!

Do the questions quickly, because Xu Heng has learned from the facts!

But someone else's question was just corrected!

This is a topic that has never been seen outside!

There is no similar question type!

Even before the person who wrote the question had time to verify it, he affirmed it?

Isn't this a joke? !

Even if Fang Zhonggui believed in Xu Heng and recognized Xu Heng again, he began to mutter in his heart.

He looked at his own question carefully, and then wrote and drew on the paper.

"In the first case, the sled is in uniform motion. The sled and the board move at different velocities, so that the greatest frictional force ..."

"..."

"During this time, the displacement of the sled..."

"..."

"In the second case, there is no friction between the board and the table. The two form an isolated system. In this case, the momentum can be conserved..."

"Finally... hiss... it really came out, with reason and evidence..."

The more smoothly he was doing the questions, the more Fang Zhonggui was shocked by Xu Heng!

Can--

Just when his scalp was numb...

The top of his head!

"Boom boom boom boom boom boom boom boom boom..."

"Buzzing...crashing..."

Great sound!

"How is this going?"

"Is there something over our heads?"

Not just him!

Even Dean Nie and the driver were shocked!

"What's going on? What's going on here?"

Now they are still on the highway!

They clearly felt that there was something huge making noise not far above their heads.

Driver, "We're about to get off the highway!"

As soon as the voice on this side fell, Xu Heng's cell phone rang.

"Ring Ling Ling..."

Xu Heng answered, "Hello?"

Wen Ruohuai, "Are you getting off the expressway soon?! The person who is going to pick you up has already arrived, and has followed you all the way, and is almost at the expressway."

Xu Heng, "???"

"Already arrived? What do you mean follow us all the way?"

Wen Ruohuai, "Oh oh oh, oops! I forgot to tell you! The person who picked you up flew there by helicopter! He was afraid of traffic jams."

Xu Heng, "What did you say?...Helicopter! Fly the helicopter to pick me up?"

As soon as this word comes out!

Dean Nie almost spat out a mouthful of old blood.

"Pfft-"

These guys are too hardworking!

They even arranged for a helicopter to pick them up!

Too arrogant!

Are you too arrogant?

? ? ? ! ! !

Xu Heng never expected that Wen Ruohuai and the Lu family would have such a mess!

Fang Zhonggui opened his mouth wide and was stunned.

He couldn't help but look up at the roof of the car!