Today's night school starts at a quarter past two o'clock, about five thirty or six o'clock in the afternoon.
In Jiangzhou in mid-July, the sun has not set yet.
"I understand~I understand~"
There was no cool breeze in the scorching hot weather, and the insects on the trees kept making noisy noises.
A month and a half ago, I couldn't hear this kind of insect chirping.
At that time, cicadas were also a kind of food...
"Uncle Wang, why are you climbing so high? Come down quickly!"
Song Chengwang raised his head, while Song Yang was still climbing up the scaffolding.
This scaffolding is used to build warehouses on dock construction sites and is four to five meters high.
Song Yang was very skilled and climbed up with just a few moves of his hands and feet.
Next to them, Gongsun Qi and Song Yang climbed at the same time, but they reached the top one step behind Song Yang.
"You guys step back and get out of the circle." Song Yang reached the top and said to the people below.
A semicircle has been drawn on the ground below, and Fang Zhe stopped the night school students outside that line.
"Your Majesty, it's ready." Wei Nan fiddled with a bamboo basket under the scaffolding.
"Pull up." Song Yang nodded.
Next to him, Gongsun Qi pulled the rope and pulled Wei Nan's bamboo basket up.
Just seeing that the bamboo basket is not wobbling at all, you know that the things inside are not light.
The bamboo basket was lifted up, and Song Yang took out the things from the bamboo basket.
"These are two copper ingots." Song Yang weighed the things in his hands.
Two copper ingots, one large and one small, were found in the ruins of the city.
This kind of copper ingot is the standard copper ingot of the Qian Dynasty. It is a semi-finished product and can be used to smelt various metal objects.
"Guess which one will fall to the ground first if I let go at the same time." Song Yang stretched out his hands one by one to hold the copper ingots in the air and asked the people below.
"Of course it's the big one!"
Not surprisingly, everyone thought the big one landed first.
When everyone thinks there will be no accidents, accidents happen.
Song Yang didn't waste any time and let go directly.
"boom!"
Just one sound, there is no sequence at all, or it is impossible to tell with the naked eye.
Two copper ingots fell to the ground at the same time.
"this……"
"how so?"
"Shouldn't the heavier one hit the ground first?"
The students in the night school were dumbfounded, no one expected this to happen.
There was a lot of discussion for a while.
Even Fang Zhe and Wei Nan were confused. They thought that the heavier of the two copper ingots would fall to the ground first.
Wei Nan stepped forward first, picked up the two copper ingots and shook them.
"There's a lot of difference in weight!" Wei Nan's face was full of confusion.
Fang Zhe also went to pick up the copper ingots.
The small one was fine, but the big one just slipped out of my hand without catching it.
With a bang, it almost hit my foot.
"Uh, it's so heavy." Fang Zhe was still frightened.
He was a weak scholar, so of course he couldn't hold a heavy object when he suddenly picked it up.
Afterwards, students from the night school also stepped forward to check the copper ingots.
The final result undoubtedly confused everyone. There was nothing wrong with the copper ingot, but there was indeed a huge weight difference.
Song Chengwang frowned and looked at Song Yang on the scaffolding, and then at the two copper ingots.
After pondering for a long time, he asked: "Uncle Wang, didn't you throw them down at the same time?"
"Oh! That's it. Your Majesty definitely didn't throw them down at the same time."
Speaking of which, some people really didn't pay attention to Song Yang's hands just now.
So now when Song Chengwang says it, everyone thinks it makes sense.
Otherwise, why would heavy things fall together with light things?
"Come on, watch carefully this time!"
Song Yang pursed his lips and smiled. He had prepared a lot of experimental materials.
So, he took out two copper ingots from the bamboo basket.
Still one big and one small.
This time, even Gongsun Qi stared at Song Yang's hands.
He and Song Yang were both on the scaffolding, and it wasn't clear whether they landed together just now.
"Watch it. Let's go!"
Song Yang let go at the same time.
Reflecting the afterglow behind this, everyone could see clearly that Song Yang let go at the same time.
"Whoa!"
The moment they saw Song Yang let go, everyone's eyes followed the two copper ingots.
"boom!"
Land at the same time!
"Ah! They actually let go at the same time and landed on the ground at the same time!"
“It’s incredible!”
"Could it be that the prince has cast a spell on the copper ingot!"
"Yes, yes! The prince should be showing us magic!"
People in the underground can say anything.
Song Yang was speechless for a while listening to their discussion.
"Gongsun Qi, throw it away!" Song Yang looked at Gongsun Qi and said.
"Whoosh!"
"boom!"
When Gongsun Qi dropped two copper ingots, the students were speechless.
The reality really breaks the inherent perception.
Song Chengwang stupidly said for a long time: "Uncle Wang! Are you the one who studies things?"
He knew that Song Yang taught gwu classes to night school students.
If you just throw things away now, is this a form of investigation?
"You can understand it this way." Song Yang said with a smile.
In order to make science more acceptable to people, Song Yang is willing to temporarily put the hat of investigating things on science.
"So this is the Observation of Things! It's very interesting!" Song Chengwang smiled and picked up the copper ingot.
After weighing it up, he threw the copper ingot up again.
If you throw it like this, the force will be different, and of course the landing speed will be different.
Tried twice without success.
Song Chengwang held the copper ingot in his hand again and let go at the same time.
This time they did land at the same time.
It has to be said that although Song Chengwang is only twelve years old, he has a good innate foundation and can keep up with nutrition.
He is now about one and a half meters tall.
And his strength is not weak either. Fang Zhe struggled to hold the copper ingot, but Song Chengwang was able to throw it.
It seems that it is not unreasonable for the old Song family to dominate the world. At least their physical fitness can keep up...
"Pay attention. Look at what I'm holding."
The people below discussed for a while, and Song Yang spoke loudly again.
This time he held in his hand a large copper ingot and a piece of wood of the same size and shape.
"Both landed at the same time!"
Before Song Yang could ask any questions, Song Chengwang shouted loudly.
"How is this possible? One piece is a copper ingot and the other is wood!"
"It is certain that copper ingots are much faster than wooden blocks!"
"Yeah! I also think the copper ingot fell to the ground first."
Song Yang ignored others and looked at Song Chengwang.
"My dear nephew, tell me what you think."
"My nephew feels this way, why can't he explain it?"
Song Chengwang scratched his head in embarrassment.
Song Yang smiled and released his hands at the same time.
"boom!"
The two objects hit the ground almost at the same time!
"How could this happen?" The students were dumbfounded.
Today's experiment completely subverted their knowledge.
When Song Yang saw that the effect was almost there, he took off the scaffolding and led everyone back to class.
"The experiment just now was a free fall experiment."
"You have also seen that different objects with different masses will fall to the ground at the same height at the same height."
…
Song Yang began to teach physics knowledge to students.
During this period, some students raised the question that when there was sleet and snow, the raindrops obviously fell first. Could it be that rain and snow did not fall at the same height?
"This is due to the effect of air resistance. We will talk about it later."
Song Yang did not elaborate on the role of air resistance, which needs to be discussed later.
Knowledge should be learned bit by bit.
The main purpose of Song Yang's experiment is to break people's inherent thoughts.
Let everyone learn to explore the essence of the problem through experiments.
This provided him with cognitive convenience for proposing other advanced knowledge in the future.