Chapter 171 How can knowledge be measured by money?

Chapter 171 How can knowledge be measured by money?

In the crowd, Qin Feng talked freely: "Do you think that there is no such friction for stationary objects?"

"Isn't it?" Everyone asked in unison.

Qin Feng waved his finger: "Wrong, totally wrong!

The stillness you see is just the result of friction and other forces canceling each other out!

In fact, this force has always been there!"

"Let's take the example just now. It's hard to push a wine glass on a rough ground because of the friction coefficient. It is subject to a lot of friction, which cancels out your thrust!

However, as long as the thrust you exert is greater than this friction, the glass can still be pushed!

Do you understand what I mean?"

Everyone was enlightened and suddenly understood: "So that's what happened."

And Yuan Zhai naturally thought of more than these people: "In other words, sometimes the shape of the wheel I choose cannot drive heavy objects forward because the friction is too great.

In this case, the wheel can only choose objects similar to round to reduce friction.

But this will cause the original problem again. When the car is traveling on a relatively soft plain or mountain, the wheels are easily pressed into the mud."

If you want to build a movable city, various terrain factors must be considered.

However, after some guidance, the elder understood the reason for the failure, but fell into a dead loop again.

When everyone in the Divine Workshop heard this, they all bowed their heads in thought and fell into confusion.

"It's not that this problem cannot be solved." After a long time, Qin Feng slowly spoke.

Everyone looked up at him suddenly, and the elder also cast a curious look.

Qin Feng didn't say much, but did a comparative experiment.

He led everyone to a tree with flowers, which was full of soil.

He asked people to find two stones of similar weight, one flat at the bottom and the other sharp at the bottom.

Put the two stones on the soil at the same time, the flat stone was stable, and the sharp stone at the bottom slowly sank.

The elders and others were thoughtful. This phenomenon, which was used to be common in the eyes of everyone in the past, has now become a little unusual.

They have never thought carefully about what the reasons behind some things that should happen in life are?

Qin Feng smiled and said, "Under the premise of the same weight, the smaller the force area, the greater the effect of the force.

Have you never thought about it?

Why do most weapons have spikes on their heads instead of other shapes?

Why is one side of the knife sharpened, but people don't use the blunt side when cutting things?

Why can needles and threads easily pierce clothes, but palms can't?"

Looking at the thoughtful and excited expressions of the crowd, Qin Feng said solemnly: "It all comes down to the effect of force, I call it pressure."

Then, Qin Feng explained the concept of pressure in the high school physics textbook.

After hearing this, the people in the Shen Gongfang were stunned at first, then bowed their heads to think, and then suddenly became clear, and exclaimed in an endless stream.

"So that's it, so that's it!"

"In the past, I only knew the fact, but not the reason. Today, I benefited a lot from listening to Master Qin's words!"

"I suddenly had a very clever idea. If the blunt side of the knife is also forged into a sharp shape, wouldn't the lethality be greatly increased?"

"Aren't you talking about the sword?"

"."

Everyone was still immersed in the joy of learning new knowledge, and the elder suddenly shouted: "Quiet!"

He looked up at Qin Feng, frowned and said: "The wheels will sink into the mud because the weight is too large and the force area of ​​the wheels is too small.

So if you want to solve this problem, there are only two ideas, either reduce the weight or increase the force area of ​​the wheels?"

Is the idea clear? Qin Feng smiled and nodded: "Considering the slip and rollover problems you mentioned, combined with the theory I said, I can provide a direction for improvement for the elder."

After speaking, Qin Feng picked up a branch and carved on the ground.

Everyone gathered together, and when Qin Feng stopped writing, a wheel status that had never been seen before appeared in front of them.

"What kind of wheel is this?" Surprised voices came one after another.

"How can this wheel move?" Someone questioned.

The pattern on the ground was a crawler wheel!

The elder looked at the crawler on the ground with his eyes wide open. He seemed to have grasped something in his mind, but he always felt that something was missing.

Qin Feng listened to the questions of the people around him, kept smiling, and did not answer.

There are a lot of mechanical concepts involved in crawler, which is not easy to explain.

"A mature craftsman should learn to think for himself after knowing the principles." Qin Feng made up a lie and gave a universal answer.

Hearing this, the people in the Shen Gongfang all narrowed their eyes and nodded in approval.

They still understood the principle that the master led the way and the practice was up to the individual.

Even Yang He, who was standing by, smiled pretentiously and said, "Well said."

Lan Ningshuang was curious: "Did you understand what the uncle said?"

Of course he didn't understand. Yang He snorted lightly: "You warriors' comprehension is still a little bit lacking. The Hundred Ghosts Taoist and the Literary Saint Taoist cultivate the soul together.

The comprehension ability is naturally not much different."

Lan Ningshuang was speechless. Zhang Tiannan glanced at her with doubt in his eyes.

"How do you know this knowledge?" The elder asked the doubts in the hearts of everyone present.

Qin Feng glanced at everyone and said with a smile: "I once had a teacher who taught me a lot of knowledge.

These are one of them.

Of course, what I benefited most from was understanding a truth from my teacher.

Never be bound by ordinary rules, learn to break them. Only in this way can you discover a new world you have never seen before! "

Yes, the teacher's name is High School Physics, People's Education Press.

The elder naturally heard Qin Feng's words. He stood up, looked at the other party, and asked: "What other knowledge is there?"

There's drama!

Qin Feng raised his eyebrows and blurted out: "Of course there are many, many!

Why do things fall to the ground instead of flying into the sky?

Why are the swimming positions of fish in the water always slightly different from what we see?

On a rainy day, why do we see thunder first and then hear it?

What are the principles behind these common things?

Don't you want to know? "

"Think!" Everyone shouted immediately.

They seemed to see the door to a new world slowly opening.

"But I'm sorry, I can't tell you. After all, I promised the teacher at the beginning that this knowledge cannot be easily passed on to others.

Otherwise, the rules are broken.

What I just described about the mysteries of friction and pressure has actually gone a bit too far.

I can't make another mistake again and again. "While speaking, Qin Feng glanced at the elder, who frowned.

The rest of the Shen Gongfang group was scratching their heads and ears anxiously.

This is like a brothel, the pretty girl is lying on the bed, the man has taken off his clothes, and is about to gallop, but the girl says that there is sunflower water.

You can only look at it, but you can't touch it.

Who can stand this?

Huo Yuan asked: "Brother Qin, can't you be accommodating? We are willing to spend money!"

Qin Feng showed displeasure: "How can knowledge be measured with yellow and white things?!"

"this"

Just when everyone was at a loss what to do, the veteran who had been silent until now sighed: "Later, you can bring the materials for forging the sword.

Also, these new things you mentioned."

"Junior, when the time comes, write it down and bring it with you!" Qin Feng said excitedly.

The people in Shen Gongfang were greatly surprised. The elder actually wanted to make an exception and forge the same weapon twice!

And they looked at Qin Feng, with strange expressions on their faces: "Master Qin, shouldn't this knowledge not be easily passed on to others?"

Qin Feng's face turned red and he coughed dryly: "Don't worry about these insignificant details."