"A new approach?"

Wang Bo and the others, who were about to do it, heard Wang Shanhai say this, and turned their heads to look at him:

"Brother Wang, is there any other way to drill wood for fire?"

"Of course..."Wang Shanhai nodded confidently: "We are the primates of all things, and we are good at using tools at the top of the food chain. ”

"This kind of thing can be solved with tools, so why bother?"

As he spoke, Wang Shanhai took out a disc-shaped stone from his back waist, and there was a hole in the middle that was obviously buckled.

This is still the prop that Ren Yan found when he explained this method to Wang Shanhai just now.

Now it has been borrowed by Wang Shanhai to demonstrate to the children.

He still remembered Ren Yan's struggle when he opened a hole in this stone, and he didn't want to stage a show in front of Wang Bo.

It's better to take it easy and show your style better.

"Brother Wang, this... What's the use? A boy next to Wang Bo asked, and the rest of them also looked at the stone and fell into deep thought.

"You know the steam engine (...) That's fine! Wang Shanhai glanced at everyone, then picked up a branch and walked through the disc stone.

"When the steam engine first became power, it had a flywheel to act as the power system when it looped, relying on the inertia generated by the flywheel."

Wang Shanhai recalled Ren Yan's words and explained slowly.

"And the function of this disc stone in my hand is actually similar to the flywheel on the steam engine, and it also plays a role of inertia."

"But for it to do its job, we need to do another step."

Wang Shanhai said, and completely stuck the disc stone on the branch, which was considered to have completed the first step.

Then he used a knife to open a cross at the top of the branch, and then pulled out a nylon rope from the miscellaneous items that Ren Yan brought.

The middle of it was tucked into the crosses of the branches, and after being tied with another thin thread, the nylon threads thrown out at both ends were wrapped in a serpentine shape around the branches.

After a while, a strange combination of branches with a stone disc falling at the bottom and a nylon rope spiraling around the upper part appeared in front of Wang Bo and the others.

"That's the tool you're talking about?" Wang Bo was puzzled.

"Yes." Wang Shanhai nodded and glanced at his son deeply.

He had never seen such a curious look on his son's face before, but now...

He could feel that Wang Bo had changed significantly.

"I call this set a flywheel for drilling wood for fire, and if you add some suitable planks for opening the fire trough, it is a set of tools for drilling wood for fire." Wang Shan Haidao.

"How do you use this thing, Brother Wang."

"Simple~" Wang Shanhai waved his hand slightly, and took the flywheel and supported it on the wooden board where the fire trough had been opened before.

After fixing the position, Wang Shanhai calmly pulled the two ends of the nylon rope wrapped around the branches.

The next moment.

The branches of the tree, which had been quiet, spun rapidly, and after a single rotation, they immediately returned to their original shape.

The nylon rope that was straightened by the two stems also returned to the winding state again due to inertia.

After that, Wang Shanhai dragged again, and the branches spun rapidly again.

After more than ten seconds, the smoke began to rise.

Wang Haisheng followed the previous method, and soon ignited a flame again.

Look at the newly lit flame in front of you.

Wang Bo and the others looked at each other, their eyes full of shock.

A flame that they couldn't handle with a lot of energy before, but now they were actually made two balls by the other party so easily.

And the last regiment is still so freehand?!

This made them a little ashamed for a while.

They are all the same people, why is there such a big gap?

However, Wang Bo and others still have an unusually strong interest in this tool.

In the future, if there is such a thing in the wilderness, who will use a lighter!

Lighters can break down at any time, but this thing can be made in minutes.

It doesn't hurt your hands yet!

It's a gift from nature!

"Brother Wang, does the principle of this thing rely solely on inertia?" Wang Bo and the others were extremely excited at the moment.

Wang Shanhai scratched his neck with a little embarrassment, the principle of this thing, he just let Yan mention it, and he probably knew what was going on.

But if he really wants to tell the truth, it will really be a little difficult for him.

"Well, it's mainly based on inertia, but there's also a part of centrifugal force."

"But to understand this, you have to study physics."

"Otherwise, you won't understand it."

In the end, Wang Shanhai could only choose such an almighty answer.

You don't understand it! ’

This trick is a common phrase used by teachers when he was in school.

When it comes to students, it can be called impeccable.

"Oh, that's it..."Wang Bo and the others nodded very cooperatively, and at the same time wrote down the physics thing.

For the first time, physics planted a seed in their hearts.

Then they played happily with the flywheel fire tool made by Wang Shanhai.

At the same time, I also want to continue to imitate some more.

However, he fell into a small embarrassment in opening a hole in the stone.

Without the right tools, it can be very difficult to make a hole in a stone.

Seeing this, Wang Shanhai smiled, and remembered the solution given by Ren Yan:

"If you're not in a hurry, you can find some clay to make a clay circle with a hole in the middle."

"When dried, it can be used as a stone disc."

Hearing this, Wang Bo and the others' eyes were instantly stunned.

I'm making it?! Can you still play like this?!

At this moment, they were deeply aware of their own shortcomings, and they all cast their adoring eyes at Wang Shanhai.

Intermediaries are not ordinary people!

Wang Shanhai was unusually useful and straightened up.

Look, my sons are starting to worship themselves!

...

At the same time, in the live broadcast room.

Netizens were also very excited to see it:

"Mommy! I've learned something from the live stream again! ”

"This pig-headed man is still very strong, and this set of drilling wood for fire has been played by him!"

"God is a pig-headed man, is it Bajie?!"

"Yes or no, this outing of Class 9 has begun to show results!"

"Damn... I reviewed the inertia when I watched it, this live broadcast is toxic! ”

"Sure enough, those who can play with Teacher Ren are not normal people..."

"Could this be like a cluster? (Dog's Head)"

"Look, you can still learn the use of idioms in the barrage, and they are really not serious people! (Dog's Head)"

However, while netizens were happy.

Longtou Mountain King Bo.

Wang Shanhai, who was proud, heard an unusually abrupt sentence.

"Actually, there's an easier way..."