Spiritism can't be used, and the loess with scrolls that can take back the trick doesn't know where it died, so everyone has to use the most primitive way to transport the "trick" back.

On the same ground, on the same object, the sliding friction becomes rolling friction, and the friction becomes smaller. Whereas, the magnitude of the frictional force is related to the force and coefficient of friction applied in the vertical direction. The force in the vertical direction is the "weird" gravity, and the coefficient of friction is the poor road environment in the land of the earth, so the key to changing the friction is to change the sliding friction to the rolling friction.

This very academic solution was the first to come up with by Tsuto, who proposed to make a cart and put the puppet on it, because he had seen that the carriage could hold a lot of things.

Tu Dun Chakra is the best attribute of the sense of substance, with the Tu Dun Chakra carefully crafted, can make a lot of interesting gadgets, Uehara tried to spend half a day, and then like a 3D printer little by little to increase the chakra, and finally completed a crooked and twisted model of the Eiffel Tower, and then was seen by the hunter was mercilessly ridiculed, Uehara also felt ugly, and then smashed it with a punch.

But now, it's time to need Uehara's help again. He couldn't make a cart full of rocks. Although they were able to build extremely flat stone slabs, very standard round stone wheels, they could not put together a complete vehicle.

The structure of the carriage is very simple, but there are many technical details that cannot be restored by a few people who have honed their combat skills all day long and have limited knowledge of machinery and life.

Uehara painted a bunch of image drawings, it took only ten minutes, with memory most of them are groping to paint, the things of the industrial age have a kind of strict beauty of rules, Uehara painted Mercedes-Benz, Dongfeng heavy trucks, tiger tanks, tricycles, tractors, excavators......

"I think this is beautiful, so we'll make this!" The eldest lady in real clothes lost her temper again, pointing to the petite and delicate Mercedes-Benz car, this posture was to make everyone agree with her choice.

"Real clothes, don't make trouble!" Uehara said softly in an elder tone, and put out another picture, "Truck, with buckets, four pairs of load wheels," he said, Uehara rubbed his head in annoyance, how to make a pile of stones move without an engine.

Uehara is worried about other problems, all of them are big trucks made of stones, plus the weight of "weird", can you pull it? But then Uehara Shi Ran, he remembered doing a similar physics test, which roughly meant that the rolling friction is much less than the sliding friction, and without the application of external force, the friction of the object moving on a non-smooth ground is much less than the gravitational force of the object.

You need bearings, you need to carve a dent on the slate and put a torsion rod, you need a wheel of the same size that is solid enough, and you need to calculate the volume of the "trick", and then design the lightest car. We had no experience in doing these things, and Uehara was responsible for everything from design to execution.

I have no experience in mechanical design, but I still know the simple scale scale, first let the reluctant hunter take the tape measure to measure the data of all aspects of the "tricky" body, and then Uehara redrew again and again, drew three views of each part, and finally zoomed in on the scale. Give it to everyone who knows how to escape.

Everyone's task began, and the finished product was sent to Uehara uncontrollably, but it was passed by Uehara again and again, either with the wrong specifications or with quality problems. Unlike steel and wood, the texture of the stone is too brittle, and even if there is a slight crack, the whole body will fall apart after not going far, so the finished wheels that were vetoed by Uehara are already two people tall.

When everyone was running out of chakras, they finally got together a complete set of parts. Most of the time, it's easier said than done, and the failed parts have been thrown around in piles and piles, piled up into a small mountain.

The final qualified finished product, similar to a rectangular unsealed rock box, is made of Tu Dun Chakra compressed to the extreme, with a uniform texture, which is made by the soil, for him, the consumption of Chakra is not difficult, it is just a few heavy consumption of a little more earth flow wall, the difficulty is that Uehara is more stringent than making forbearance equipment.

The stone pillar responsible for the linkage bearing is made by the earth dog, and the stone rubs against the stone, and the wear must be very serious, so Uehara turned over the cabinet and looked for it in the scroll for a long time, and the edible vegetable oil gritted his teeth and gave him a big bucket, who let him not get the lubricating oil.

When it was in charge of assembly, it was very troublesome, and everyone could lift the huge stone carriage together, but if two or three people were to lift it together, and someone else controlled the direction and put it in the right position, it was too difficult. There is no way, Uehara has let everyone come up with a complete set of construction tools, fixed pulleys and moving pulleys or something, moving pulleys are labor-saving, and sliding down changes direction. There is no rope, and the hell has iron chains, and Uehara also has them, and then he can easily move around with huge parts hanging in the air one after another with iron chains.

"Slow down, dirt, and put the wheels a little forward! Yes, okay, it's okay, put it down slowly! "Uehara stands on a high place and directs everyone's every detail, and the idle hunter stands next to Uehara and feels that Uehara who commands the overall situation is cool, and as for Uehara himself, he feels that if he wears a hard hat, he will become a foreman on the construction site......

"Are you alright?" Uehara jumped off the big rock, walked up and patted the smooth body, except for being ugly, this big "truck" bigger than the "weird" is decent, but there is no front, because there is no engine, no fuel tank and no exhaust pipe, it is too discordant.

"That's it!" He jumped around the car with excitement, can the big guy that everyone made together really run? He would love to try it.

"Then you can try......"

"Roar!" As soon as Uehara's words fell, Kari jumped from the side, and he had long wanted to play with everyone.

In the state of the empty car, the most powerful Changtu can pull up and run alone, although it seems that he is a little struggling. Looking at his hands dragging an iron chain one by one, the knotted muscles on his arms bulging, and the strong ones compared to the spider pills, Uehara was a little embarrassed. It seems to be related to Chakra, earth-type ninjas tend to have a lot of strength, and this phenomenon will deepen as they practice, while Thunder Ninjas tend to exceed the reaction and speed of others.

As an earth-retreat ninja with an advantage in strength attributes, Uehara's strength, his strength is not as strong as that of real clothes, so don't talk about it......

Like a calf, the earth tirelessly pulled the broken car and ran round and round, the squeaking sound was very harsh, but everyone was unconscious, and looked around very carefully.

"The quality is good...... Uehara nodded unexpectedly, he had already run dozens of laps, and the car was unexpectedly not falling apart, and Uehara was already very satisfied.

He was addicted to playing in the field, and he refused to stop when others asked him to stop, but ran faster and faster.

……

The loess has been here for a long time, how powerful the "trick" is, he knows very well, he thought that a group of little ghosts must be very embarrassed after a hard fight and waiting for him to arrive, but a group of people laughing and laughing don't know what they are doing, he decided to secretly observe for a while.

"That's enough, Heaven!" Uehara shouted a few times before interrupting the road, but after hearing the sound, he found that he couldn't stop the car, he was in a hurry, and pushed his arm back hard, but the mass was very large, and the car turned over a few times directly due to the deviation from the direction, and fell to the ground with a bang.

There was almost a safety accident, not only Uehara was startled, but the loess hidden in the distance was also frightened and almost jumped out.

"Are you alright, Pheto?!" Uehara was the first to run towards the stumbling earth that was almost covered under the car and was a little frightened.

"It's fine!" He smiled honestly, wiped the sweat on his head and said.

"So, you've been running for half an hour, do you feel tired?" Uehara looked at his watch, no more, no less, exactly half an hour.

"Not tired!" Hanto clenched his fist fiercely, and his arm bulged with muscles that made Uehara envious.

"Cattle!" Uehara cursed silently in his heart, a vehicle that can fit up a "trick" that is half the size of a puppet, and the body is still a very dense rock texture, the whole car weighs at least a few tons according to Uehara's estimates, but he ran for half an hour at a speed that is not slow, and he also said that he is not tired, you know, he is only fourteen years old, and the physical fitness of a ninja is ......

After Uehara asked everyone to hold up the body, he climbed under the car and carefully inspected it inch by inch. After running for so long, and landing on a 720-degree somersault, Uehara didn't find a crack in the end, which is enough to complete the task of lying down.