not the thing I was searching for but I still learned SO much! Great explained ! I really understood everything and learned a lot, and had funt at the same time! thank you!
@Lamboragon I think you're right that one will understand and can work with physics better with sufficient calculus. However, physics is usually what excites young minds and the basic principles to work with can easily be explained without calculus. To take your point to the extreme, should you respond to a child, who asks why a ball falls toward the earth, that you'll tell them the answer after they've taken calculus?
@Lamboragon A force is a push or a pull, and most HS physics teachers introduce vectors to students in order to deal with forces correctly. However, forces can be discussed even earlier if everything is kept in one dimension.
@Lamboragon There is a lot of physics that can be learned without calculus. To understand the underlying reasons why things are the way they are.... Calculus makes it so much easier. However, basic principles can be understood without calculus. (You can learn to use the equations, you just don't get to see where they come from...)
@kungfumaster4444 You mean accelerate due to gravity? They are pulled together by a fundamental force of the universe. Explaining how gravity works would be trickier...
In more detail: gravity supplies a force, and a force acting on a mass causes it to accelerate.
what if you drilled a hole in the earth from the north pole to the south and droped a ball in the hole would it fall for ever? cuz the ball is falling tawareds the center of the earth
@marybob321 Ignoring (air) friction? Yes, the ball would fall forever... it would pass through the center (going very fast) and start to slow down until it got about up to the surface on the other side. Then fall back to the middle again (and again, and again...) If there were air friction it would be similar but it would go slower and turn around further from the surface each time until it wound up in the center. (ignoring the whole magma issue of course...)
Huh, as an engineering student I already know a lot of this but you give a wonderful explanation on how an orbit works. I did not know about the free fall sensation astronauts feel though, very interesting! Goes to show you learn a little something every day huh?
I've heard some people tell me that astronauts actually adjust to the "constant falling" sensation fairly quickly. The going over the edge of a roller coaster might not be a fair comparison, as there's no wind. I assume the astronauts' brains simply adjust fairly quickly to ignore the falling after a little while or something like that...
Interesting. Since technically they're also moving forward 1 meter for every meter they fall (Assuming perfectly circular orbit), do they experience a sense of forward momentum as well?
No, I'm not a big fan of colas... Root beer, on the other hand, is very good. Diet root beer typically, as you don't need to see me hyped up on sugar (or caffeine for that matter...)
Yes, but it also includes that it pulls you down faster and faster. on the Earth, you're pulled down, but the ground keeps you from "falling" so you don't experience free fall...
It is wrong to say astronauts don't feel like they are floating when they are orbiting the earth.
When we fall, the unpleasant sensation only lasts a short time and because few of us experience falling for more than a couple of seconds, we erroneously believe that the feeling of falling lasts for as long as we fall.
Try skydiving, then you will see that the sensation of falling only lasts a few seconds as we change from rest to constant acceleration, then we feel like we are floating.
Actually, it is a LazerTag brand gun. It shoots infra red beams like other LazerTag equipment, but the "Nerf"-style dart actually has a capacitor in it. When it hits the ground it gives out an IR "burst", tagging any players near it.... (Sure, calling it a Nerf gun would have been easier, but incorrect...)
gravity follows newton's third law right? then earth must also "fall" towards the whatever orbiting it! the does the earth swirl? i heard the body and the earth rotate about their common centre of mass??
Yes, that is correct. The moon and the earth rotate around a point that is slightly offset from the earth's center. (Although I'm pretty sure this center of orbit is well inside the earth.)
In the same spirit, when you "fall" out of a tree, the earth is also falling up towards you... just an indetectible amount due to the difference in mass.
Well, to be really technical the Earth is falling up at you when you fall down to it... it has the same momentum (and thus is moving WAAAY slower than you are when compared to your combined center of mass.
To continue, the sun is orbiting the center of the galaxy, and our galaxy may be orbiting other galaxies, but I don't think so. (I'm not sure on that point... gets pretty disperse after that point...)
cool vidi man i wish our teashers could learn frm u
iamcoolrght1 4 months ago
not the thing I was searching for but I still learned SO much! Great explained ! I really understood everything and learned a lot, and had funt at the same time! thank you!
bladdeins 4 months ago
@Lamboragon I think you're right that one will understand and can work with physics better with sufficient calculus. However, physics is usually what excites young minds and the basic principles to work with can easily be explained without calculus. To take your point to the extreme, should you respond to a child, who asks why a ball falls toward the earth, that you'll tell them the answer after they've taken calculus?
richragan2 5 months ago
@Lamboragon A force is a push or a pull, and most HS physics teachers introduce vectors to students in order to deal with forces correctly. However, forces can be discussed even earlier if everything is kept in one dimension.
sciencetheater 8 months ago
@Lamboragon There is a lot of physics that can be learned without calculus. To understand the underlying reasons why things are the way they are.... Calculus makes it so much easier. However, basic principles can be understood without calculus. (You can learn to use the equations, you just don't get to see where they come from...)
sciencetheater 8 months ago
i want an idea about george darwin. Please post
navdanji 9 months ago
I love how you use Einstein to introduce Newtonian gravity... just sayin
XxBrian88xX 1 year ago
Great video,
What's the formula for this? How fast the satellite needs to travel to miss the earth?
cystum 1 year ago
@cystum it depends on how far above the earth it is orbiting. You put centripetal force equal to gravitational force and solve for speed...
sciencetheater 1 year ago
40,075 Km is the perimeter of earth.
So the min speed should be 40,075 Km/sec.
265650 10 months ago
Hyperactive
Darkspeed369 1 year ago
This has been flagged as spam show
good teacher. Thanks
MrJoefung007007 1 year ago
good teacher.
MrJoefung007007 1 year ago
do you know why objects accelerate?
kungfumaster4444 1 year ago
@kungfumaster4444 You mean accelerate due to gravity? They are pulled together by a fundamental force of the universe. Explaining how gravity works would be trickier...
In more detail: gravity supplies a force, and a force acting on a mass causes it to accelerate.
sciencetheater 1 year ago
@sciencetheater In the end, it comes down to mass. Mass feels and also causes a gravitational force :)
Gravity IS a force :) Just like there is electric and magnetic :)
TheGrinningSkull 1 month ago
@kungfumaster4444 In the end, it comes down to mass. Mass feels and also causes a gravitational force :)
Gravity IS a force :) Just like there is electric and magnetic :)
So there are 3 fundamental field forces that cause acceleration and those are gravity, electric and magnetic.
Gravity caused by mass, electric caused by charge and magnetic caused by moving charge :)
TheGrinningSkull 1 month ago
what if you drilled a hole in the earth from the north pole to the south and droped a ball in the hole would it fall for ever? cuz the ball is falling tawareds the center of the earth
marybob321 1 year ago
@marybob321 Ignoring (air) friction? Yes, the ball would fall forever... it would pass through the center (going very fast) and start to slow down until it got about up to the surface on the other side. Then fall back to the middle again (and again, and again...) If there were air friction it would be similar but it would go slower and turn around further from the surface each time until it wound up in the center. (ignoring the whole magma issue of course...)
sciencetheater 1 year ago
looks like a magic trick @ 1:37
DJkkrown 1 year ago
It would be cool to become an astronaut lol... There is also escape velocity, which is pretty awesome if we can achieve that speed...
darkspy123 1 year ago
Huh, as an engineering student I already know a lot of this but you give a wonderful explanation on how an orbit works. I did not know about the free fall sensation astronauts feel though, very interesting! Goes to show you learn a little something every day huh?
detravon 2 years ago
I've heard some people tell me that astronauts actually adjust to the "constant falling" sensation fairly quickly. The going over the edge of a roller coaster might not be a fair comparison, as there's no wind. I assume the astronauts' brains simply adjust fairly quickly to ignore the falling after a little while or something like that...
sciencetheater 2 years ago
Interesting. Since technically they're also moving forward 1 meter for every meter they fall (Assuming perfectly circular orbit), do they experience a sense of forward momentum as well?
detravon 2 years ago
Well, any direction is going to feel the same as another... (you're "floating" in space so could just align yourself any way you want.)
However, be careful in how you say things. You can't "feel" momentum, only changes in momentum (ie. accellerations).
sciencetheater 2 years ago
Very true.
detravon 2 years ago
are you on coke???
ascione99 2 years ago
No, I'm not a big fan of colas... Root beer, on the other hand, is very good. Diet root beer typically, as you don't need to see me hyped up on sugar (or caffeine for that matter...)
sciencetheater 2 years ago
so free fall is gravity pulling down on u r is it something else.
neji123455 2 years ago
Yes, but it also includes that it pulls you down faster and faster. on the Earth, you're pulled down, but the ground keeps you from "falling" so you don't experience free fall...
sciencetheater 2 years ago
This has been flagged as spam show
It is wrong to say astronauts don't feel like they are floating when they are orbiting the earth.
When we fall, the unpleasant sensation only lasts a short time and because few of us experience falling for more than a couple of seconds, we erroneously believe that the feeling of falling lasts for as long as we fall.
Try skydiving, then you will see that the sensation of falling only lasts a few seconds as we change from rest to constant acceleration, then we feel like we are floating.
tma1 2 years ago
Comment removed
tma1 2 years ago
its not lazeer tag if it shoots darts lmfao
tehfrog 2 years ago
Actually, it is a LazerTag brand gun. It shoots infra red beams like other LazerTag equipment, but the "Nerf"-style dart actually has a capacitor in it. When it hits the ground it gives out an IR "burst", tagging any players near it.... (Sure, calling it a Nerf gun would have been easier, but incorrect...)
sciencetheater 2 years ago
oh sorry hehee
tehfrog 2 years ago
mhm? but if he runs soooo fast, he would fly straight away?...because he hurdles the gravity of the earth...? or do I be wrong?
cleptopsy 2 years ago
Oh, he'd curve at least a little tiny bit due to the earth's pull... even if it was mostly straight...
sciencetheater 2 years ago
look the earth is falling xD
MichaeljacksonAFG 2 years ago
how i wish teachers at school could explain physics in sucha fun way !!!
addieroxrev09 2 years ago 10
than the student would understand the stuff faster :P
alienfac32 2 years ago 2
RUN THEN TRIP!! lol
racenuke 3 years ago
great one!
imago95 3 years ago
i love you
eitanst 3 years ago 2
thank u sir...very useful
Bouncert 3 years ago 7
very useful
lolface1991 3 years ago 2
heh, very good video. I never realised astronauts were like that.
fiable262626 3 years ago
why orbiting objects (falling) do not accelerate? please respond. any one. thaks
ossanabri 3 years ago
They are accelerating. They are accelerating downward (towards the planet), not forwards.
They accelerate 90 degrees off of their direction, so they don't get any faster when they accelerate. They just change direction.
sciencetheater 3 years ago
Sick English Accent
apurelondner 3 years ago
not an english accent, that man is clearly american.
robertreilly666 3 years ago
I wish you taught my school.
You have such an enthusiam for Science =)
nolife78 3 years ago
This is awesome!!!!
Thank you. You helped with my physics homework :P
jigglebox2002 4 years ago
Yep, I'm a hyper dude.
sciencetheater 4 years ago
gravity follows newton's third law right? then earth must also "fall" towards the whatever orbiting it! the does the earth swirl? i heard the body and the earth rotate about their common centre of mass??
independence8 3 years ago
Yes, that is correct. The moon and the earth rotate around a point that is slightly offset from the earth's center. (Although I'm pretty sure this center of orbit is well inside the earth.)
In the same spirit, when you "fall" out of a tree, the earth is also falling up towards you... just an indetectible amount due to the difference in mass.
sciencetheater 3 years ago
if im falling down to the earth, and the earth is falling down the sun, what is the sun falling down on? and what does that fall down on?
reyknow 3 years ago
Well, to be really technical the Earth is falling up at you when you fall down to it... it has the same momentum (and thus is moving WAAAY slower than you are when compared to your combined center of mass.
To continue, the sun is orbiting the center of the galaxy, and our galaxy may be orbiting other galaxies, but I don't think so. (I'm not sure on that point... gets pretty disperse after that point...)
sciencetheater 3 years ago
very informative! tnx for the reply, and keep it up! you deserve a feature in youtube for making these videos! :)
reyknow 3 years ago
this is cool though this guy looks all hyper
joelfcocd 4 years ago