/sci/ - Science & Math

>mwf you would know the answers to all those questions if you just paid attention in highschool/ read your textbooks.

Not sure if troll, but w/e
In Newton's third law, the force isnt applied to the same spot. Force is applied to both bodies, but you also have to factor for the different points of origin and external forces such as gravity and friction.
Every body creates a magnetic field proportional to its mass, and therefore the Earth and the Moon are pushed away by the magnetic field.

>>2433598
Surely you mean gravitational.

>>2433597
>mfw you were just on /v/ too

>>2433612

>>2433610
No. Are you retarded?

>>2433612
>mfw when i called that reaction image the same name

not every force is an action reaction pair

push a wall on a slippery floor you move backwards, cuz the force required to move you is less then the force needed to move the wall, so the wall stays still and you move but yet you pushed the wall, so the wall must have pushed you as well...

>>2433617
I think you are mistaken, the moon orbits the earth because it is traveling at a fast enough velocity to not fall in, but too slow to escape.

>>2433582
the object isn't pushing back on you when you push it, there's just an equal and opposite force when you push on it. It's the feeling of, you know, pushing on something. It's what stops your hand from accelerating through the object. Just because an object is pushing on you, doesn't mean that the force that you are pushing on it with goes away.

If you draw some free body diagrams it makes sense.

Box has force of gravity and normal force in equal and opposite directions. It also has the force of the person pushing on it.

Person also has force of gravity and normal force, but it has the force of the box pushing back on him.

The box still moves because it has a force applied to it. The person does not move because he's, you know, pushing.

>>2433616

>>2433631
he never said anything about why the moon orbits the earth, just some stuff about magnetic fields

>>2433633
dubs, could you post those pics

I kind of get what it means, but seeing it is easier
it works better if the image has shiny things in it, too

>>2433637
I assume >>2433598
>Every body creates a magnetic field proportional to its mass, and therefore the Earth and the Moon are pushed away by the magnetic field.
was trying to address this question >>2433582
>Why the fuck the Earth doesn't crash against the sun?
by using a similar example of why the moon orbits the earth.
But, saying the moon orbits the earth because of magnetic fields is wrong, I'm afraid.

I think that we should rip OP's throat out

>>2433662
Hold your horses there, MacGruber

>>2433662
Now now, as scientists, it's our prerogative to educate. That's why many of us become professors see?

>>2433631
>the moon orbits the earth because it is traveling at a fast enough velocity

durrr why is that?
because magnetism

>>2433680
0/10

>>2433680
It's called orbital velocity; The moon (or Earth in the case of the earth and sun) is constantly accelerating toward the earth. However, it is traveling at a constant velocity tangent to the earth so fast that it doesn't fall in. You can experiment with a bowl and a marble, get the marble to travel along the slopes of the bowl fast enough and it wont fall in, but as it slows down it starts to fall into the bowl. Same with the moon around the earth and the earth around the sun. If it were traveling too slow it would spiral in; too fast and it would spiral out.

Okay, so if you take a baseball and just drop it, say, from a height of 10 meters, it'll free fall towards the earth, accelerating at 9.8 m/s^2, right?

Now, instead of dropping it, throw it so that when it leaves your hand it's moving perfectly horizontally. It'll move some distance horizontally, but you know that, vertically, it's still in free fall, right? So eventually it'll hit the ground.

For distances that you could realistically throw a baseball, you can think of the ground as flat. But remember, the earth isn't flat -- it's spherical. So say Superman threw the ball, and he threw it so quickly that you have to take into account earth's curvature. Remember that the ball is in free fall, but you should think of it as falling towards the center of the earth.

So imagine Superman throws the ball from New York York. (It would help if you looked at a globe -- not a map, a globe -- and imagine the path of the ball. Remember, when the ball leaves his hand in New York, it is moving perfectly horizontally.) At first he throws it so fast that lands in Lake Michigan. That's not fast enough for Superman, so he throws another one that goes all the way to Hawaii. Notice that, as the ball free falls towards the earth, the earth's surface is curving "away" from the path of the ball -- but not curving enough, so eventually the ball touches down in Hawaii.

Superman throws another one even faster: this one sails past the Great Lakes, over the Pacific Ocean, past all of Asia, and lands somewhere in Europe. Finally, Superman throws one last ball, this one with such incredible speed that, even as it free falls towards the center of the earth, it's moving so quickly that it NEVER lands. In fact, after it goes around the world, it whizzes past Superman's ear, and since it still has the same horizontal velocity (we'll ignore air resistance here) it'll follow the same path it did before, and continue to orbit the planet.