Interaction principle?
Hello,
The principle of interaction assumes that every force has an equal and opposing force. This can be applied to many everyday examples, such as driving a car. However, one thought experiment remained unanswered for me:
Let's imagine a person exerts enough muscle force to push a car. The person has less mass than the car, and therefore the car is more inert. What I don't understand is: if the person is subjected to the same counterforce that was exerted on the car, why doesn't he feel any consequences, like being pushed away or something like that? I know that's not the case in reality, but I don't quite understand why.
I hope someone can help me.
Thank you for any answer
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Hmm… Smooth a car pushed on? You still don’t remember it?
Right. But the human being relies on the ground. Says he introduces the “genius” into the ground and thus into the earth. If his feet find sufficient support on the ground;)
How to get there and how does the soil react?
You look at the human beings and consider where he can touch anything and transmit powers…
Just as if the car itself drives by turning its wheels over the floor. The impulse that moves the car forward also moves the ground back.
Man is basically only the link for transmission.
As you know so well in this subject, I wanted to ask you a little more questions. Following examples: 1. If an apple falls down, the gravitation affects him and as a counterforce it affects the earth. However, since the mass is too large, nothing happens. But if the mass were large enough, then the earth would almost slide to the apple, as the earth would push the apple to itself, or if earth would be pushed to “below”.
2 Example: You will surely know the example with the 2 roller boards, where only 1 person has to pull and then both meet in the middle. This happens because body B then has a counterforce, which is caused by the on-sich-rush to body a.
Does this mean in reverse, if a force pushes something in itself, that the other body, i.e. the counterforce, also pushes against the other body and if a body pushes the other body away (example driving (ripening/earth) that the other body pushes the other body?
Please read my last answer again. It’s in.
I think it’s getting tired.
And what about the redirected counterforce on Earth? So we have pushed the earth back through the tires and the counterforce but also the muscle power and the forwarded counterforce into the earth, nothing happens?
The fact that the car is pushed forward and the ground is pushed backwards is already force and counterforce.
So, if bodies obviously can’t absorb the force and usually deform, then do they direct the forces further? Thank you! What else to the car example: clearly, the human being directs the counterforce to the earth, but I have meant with the question whether, because a counterforce acts on each force, the earth itself then reacts in addition: The tyres push the Earth backwards-> Earth presses car forward+ Man directs counterforce into the earth, then does not a force again affect this counterforce from the earth to the forwarded counterforce? And if so, does it affect the car? will this force be transferred to the car by the body? I really wanted to thank you again!
Exactly.
Then if they do not absorb the force (which usually comes with deformation).
Just like the apple falling from the tree: you transfer the impulse to the ground and basically push the earth away, but thanks to the high mass inertia of the earth, the effect is so low that no one could measure it.
And what else: if body can transmit forces? If the forces are transferred to the ground, does the ground not react in any way? So a counterforce?
Thank you. I would have another question if it didn’t bother you. When an apple falls on the ground, the gravity acts from the earth on the apple, so that it falls down. The apple then presses a counterforce on the earth. It probably doesn’t work because of its inertia, does it?
Right. The wheels turn, have grip on the ground, and thereby they transmit impulse to the ground. They push the floor to the rear and thus the car to the front.
Understand, but if I “drive” the car, then the wheels move and rub on the floor as well? Isn’t that right?
No, you suck instead of from own drive of the car!
You’re just doing what’s going on in a car that’s driving alone, making tires.
Yeah, sure. That’s why the example with the bald tea. Then the feet slide away and you can’t transfer the force to the ground. Accordingly, you are pushing yourself away from the car rather than moving the car ahead.
I can’t imagine it with that one. Does that only work if you have a firm hold? Bzw, when will forces be forwarded.
So I push virtually the car, the counterforce is directed into the floor and through the friction with the tires, the car is additionally driven.
You forget a few powers.
In the weightlessness in all, it would be that you would push the car only very little and you would finally push away from the car.
What you have overlooked are the forces that act on the feet and the floor.
As a result, the strong force imparted to the car has a force back. Only this force is directed into the feet that stand on the ground. And put it in the ground.
Imagine the man standing on smooth ice and trying to push the car. He’ll slide back. And just this slipping away is the counterforce of the car. Because it slips backwards, we know that a force has to act backwards.
Even if you don’t get so good on the ground, that happens. You slip away.
It’s because you’re going against the car. There is quite a force that pushes you away when pushing a car, which is why you “lower” the center of your body when pushing so that it does not happen. If you run full lotte right against a car, you will be flying back.
The necessary energy must be taken into account. If something floats on an oil layer, then I push it with minimal effort. I need more strength with tires, but I can do it. With iron stoves on asphalt, I don’t move that thing a milimeter.
Time is work.
and it is easily possible that a person can push a car, even trucks and trains have already been pushed or pulled.
The mass is not really relevant, it is the energy that can be used….
Okay, but that doesn’t really answer my question.
the mass is the one, the impulse the other.
if baldness prevails, the lower mass of man is affected, and he pushes himself to the rear. Otherwise, the ground and with it the whole planet is what gives counterforce.
So the Earth delivers a counterforce, so we don’t get thrown away like a balance of forces?
I have written