Super Scholar: Start with a low regulatory score!

Chapter 116 You can know the answer only by physical instinct!
"Why is it 88 points again?"

"Or……"

"All these four competitions let me control 88 points?"

"If this is the case, there are benefits, at least it will not be too eye-catching. After all, it is impossible for everyone to be number one."

Jiang Nan thought secretly.

Then I got the physics test paper and glanced at it.

Five multiple choice questions.

6 points per question, 30 points in total.

Five fill-in-the-blank questions.

6 points per question, 30 points in total.

Two answer questions.

20 points per question, 40 points in total.

And he needs to control the score at 88 points. The easiest way is to make a wrong choice and fill in the blanks.

Ah!
perfect.

After paying attention, Jiangnan started working directly.

first question.

"As shown in the figure, the upper end of a flick with a stiffness coefficient h is fixed on the ceiling, and the lower end is connected to a small ball with a mass m. The balance position of the small ball is 0 as the coordinate origin."

"The positive direction of the x-axis is downward. If the origin of the coordinates is taken as the zero point of the potential energy of the system, then when the ball is located at the coordinate x0, the total potential energy of the system is..."

A: 1/2kxo^2-mgxo.

B: 1/2k (xo+mg/k)^2-mgxo.

C: 1/2k (xo+mg/k)^2.

D: 1/2kxo^2.

……

Jiangnan: "..."

Some speechless.

just because...

He always felt that the questioner was insulting his IQ.

Such a simple question.

Is it really necessary to take the test?

And is it a so-called competition?

Almost without thinking, he chose B.

As for multiple choice?
This is obviously not multiple choice.

And the problem-solving process?
Is this still a problem-solving process?
Is there really someone who can't even do such a question?
If so, you can only go to the hospital for an examination to see if there is a problem with your IQ.

One after another, the questions were screened.

Almost in the blink of an eye.

Jiang Nan finished the five multiple choice questions.

Uh!
Ok!

It seems that there is one more mistake.

In order to control the score of 88, he had to erase the last multiple-choice question and fill in a wrong answer on purpose.

then……

It's four fill-in-the-blank questions.

same!

He was almost out of physical instinct.

I got all the fill-in-the-blank questions right in one go.

So much so that he had to do the same thing as before, erasing a question in turn and replacing it with a wrong answer.

Hey!
This damn instinct!
The only blame is that his physical level is too high, and his physical foundation is too strong, which is really a touch of sadness.

but……

Get the 12 points that should be deducted.

The next two questions are easy to answer.

Eleven questions (20 points).

"As shown in the figure, a rectangular plate of mass M and sufficiently long rests on a smooth level ground.

The left end of the plate is connected to a horizontal light spring with stiffness coefficient h, and the other end of the spring is fixed on the wall; there is a small object with mass m on the plate.

At time 1=0, the plate is at rest.

And the small block starts to move to the right at a speed of [-].

It is known that the coefficient of sliding friction between the small block and the flat plate is μ, and the magnitude of the acceleration due to gravity is g.

(1) Proof: When the small object slides to the right relative to the flat plate, the motion of the flat plate is a simple motion. Find the amplitude and frequency (period) of the simple motion.

(2) If the plate starts to move to a quarter period from time t=0, and it happens that the small object is stationary relative to the plate for the first time, find...

(i) The value of the initial velocity of the small block.

(ii) Heat generated by the plate during a quarter cycle of motion. "

……

Jiang Nan watched carefully for three seconds.

then……

Then start solving the problem directly.

There is no need for scratch paper at all.

just because...

This question looks very long.

But simple couldn't be simpler.

It is nothing more than examining friction, simple harmonic motion, and issues such as energy conservation.

It can't be said that it is old-fashioned.

It can only be said that they were all rotten.

solution.

"1: When the small object slides to the right relative to the plate, the sliding friction force on the plate is...

f=μmg.

direction to the right.

For flat plates, Newton's second law has...

f-kx=Ma.

In the formula, x is the elongation of the paddle, and a is the acceleration of the plate (to the right is positive).

Let x'=x-umg/k.

From ①②③ formula, -kx'=Na.

visible……"

"2..."

"..."

There was hardly a pause.

He solved the two questions in one breath.

Then...

That's the last question.

have to say.

There is a little something about this finale.

Unlike the previous ones, the answer can be seen at a glance, just like sending points, even fools can pick it up.

And this question 12.

Jiang Nan thought for a while.

then……

He has an idea.

After half a minute.

Finish writing and call it a day.

Jiang Nan got up and handed in the paper.

"Jiangnan?"

The invigilator looked at the name on the test paper, and frowned instantly, "Are you the Jiangnan of the third middle school who won the first place in the city in the Mathematical Olympiad two days ago?"

"It's only been a few minutes for the exam, why can't you do it, why don't you just hand in the paper and give up the exam?"

"..."

For Jiangnan.

The invigilator of No. [-] Middle School naturally knew about it.

after all……

In the past two days, Jiangnan's name has been widely spread.

but……

The Jiangnan Olympic Games are strong.

It doesn't mean that its physics are also good.

As for the so-called No. [-] figure, it was a joke. Most people in No. [-] Middle School didn't believe it, so he naturally didn't believe it either.

Especially now that the physics competition has just started, and Jiangnan is about to hand in the papers, which is even more obvious proof.

No need to read the test paper.

He can tell.

Jiangnan is a scumbag in physics.

For a paper with [-] points and [-] questions, Jiangnan will score zero in nine out of ten cases, and he will not be able to solve any of the questions.

It's called...

Abandon the exam.

In this regard.

Jiang Nan frowned slightly, and said, "Teacher, I didn't give up the exam, but I just handed in the paper early when I finished."

Done!

He just left.

There is another chemistry competition in the afternoon.

The weather is nice and sunny today.

When he has time, he also wants to go to the lawn to bask in the sun, take a rest, rejuvenate... and store up his energy.

"Humph!"

"Arrogant and arrogant, I don't know what it means."

"I'd like to see you, how many points you can score."

The invigilator didn't have a good impression of Jiangnan, but now he's even more disgusted.

however……

When he picked up the Jiangnan paper to check, he was stunned for a moment just like a certain invigilator before.

"This……"

"It's not a white paper?"

"Is he really done?"

"how is this possible?"

"It's only been a few minutes since the exam started!"

"Even if he writes randomly, it's impossible to be so fast! Besides... it doesn't look like scribbles???"

"what?"

"It's really not random writing. He got the first question right, and the second question too, um, and the third question..."

"..."

(End of this chapter)