What is Escape Velocity? How do we go to other Planets?
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- เผยแพร่เมื่อ 21 ก.ย. 2024
- Here we discuss escape velocity of a spacecraft leaving the gravitational field of another planet. Every planet has an orbital speed and and an escape speed. All orbits are actually elliptical in shape. If we continue to add energy to an orbiting object, the ellipse will get larger and larger and eventually the shape will change from an ellipse to a parabola. all orbital shapes are actually conic sections. We discuss what conic sections are and how orbits work.
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Twitter: / jasongibsonmath
This guy is the first person I have " met" who can explain physics. He doesn't have only the knowledge but also the didactic to pass the information on with great clarification. This is what means to be a professor/ teacher. Many can have the knowledge but if they don't know how to explain the subject; the title of being a teacher doesn't make them a teacher.
This guy is fantastic!
He gets right into things. He doesn't waste time. There's no pointless fluff. He doesn't try to be funny or cute or make the videos all about himself, which so many TH-camr's can't resist doing.
He just lays out the most necessary information in a very organized manner that's easy to follow. In fact, watching him draw on a board is even more effective than cutting away to fancy animations or graphics with voiceover. Something about uninterrupted video makes you really stay focused.
I just found this guy's channel.
I'll be watching many more.
Man you do NOT get enough praise. All of your videos are amazing brother thank you so much for everything you put into them. 🤘🏽
I appreciate that! Thank you again!
Best teacher, you take any subject puts heart and soul into teaching.
The best math and science teacher in the United States hands down! Thank you!
Wow, thank you!
I received my BS in mathematics in the early 90s. I would have loved to have had you as a teacher or a professor. Very well done. Thank you.
Great introduction to a subject that has always been of great interest to me: orbital mechanics. When rendezvous of spacecraft became a thing during the Gemini program, I was perplexed by the apparent enigma of accelerating a spacecraft into a higher orbit, only to then have a lower orbital speed. That provoked my interest at that point!
I think I might do a video on that topic one day, explaining why. But since you are interested think of this. You push a child on a swing. There is a low point when they travel fastest. There is a high point when they travel slowest as they turn around. This is analogous to the low point and high point of an elliptical orbit. If the child comes down and at the bottom where they are moving fast you PUSH them, you have added energy to that system instantaneously at that point. What happens is that they will climb higher at the next turn around point. Your push at the bottom affected the shape of the orbit at the highest point.
@@MathAndScience , thank you so much, Jason.
Spectacular job, Mr Jayson!
I feel like you'll soon do a lesson about Einstein's theory of relativity if you continue doing these kind of vids. I couldn't be more excited 🤩🤩🤩
Excuse my sniping from a concealed position. I enjoy your videos.
At about 2min33s " delay the impact" implies the travel time would be extended.
A technical inexactitude.
It would go further, but it wouldn't take more time.
Hang on. There were 2 different ellipse were there not? One where the V
Meilleur professeur des mathématiques et sciences. Bravo.
Absolutely brilliant how you explain this, thank you.
Simplified Great explanation! Thanks a lot.
A circle is just a special case of an ellipse, where the max and minimum axis are the same dimension. So arguably there are only 3 conic sections/shapes
simply marvellous lesson and really intersting. superb teaching and teacher.
Thank you for the videos
You are the Best😃
Jayson it's just another superb topic thanks Master.
Thank you
You are the best man!
THANK YOU... SIR...!!!
LOVE THIS SUBJECT...!!!
Thanks
I'm missing the proof that the escape speed actually exists. From the mountain example, one could argue that the air friction is inversely proportional to the speed. So, the faster the bullet, the higher the drag. For all that matters, there could exist something like the terminal velocity of a failing object.
I know that escape velocity exists, at least for the Earth and the Moon, but I fail to get the proper explanation in this video. Here, the existence of such velocity is taken for granted.
Awesome!😊
when is the lesson on this subject??will be waiting..
Really great presentation
Glad you liked it!
Kerbal space program helped me understand some of this beforehand
Entropy is one of the deepest ideas in physics
Could you give your research, how do you understand entropy?
For first smallest ellipse, ISH will crush back into earth? It won’t orbit forever right?
You are amazing,You caught me a lot. :D
Glad to hear that!
Can you please explain geostationary satellite and it's usesCan you please explain geostationary satellite and it's uses
Another great video!
Glad you enjoyed it!
13:29-ish where speed is less than circular speed. Does the rocket spiral down to Earth? Is it a temporary orbit?
Yes it will just fall down in an arc towards the planet. That is now orbiting spacecraft Re-enter. They just slow down a bit by firing thrusters in the direction if travel (engines facing forward), then they arc down to the atmosphere and gravity pulls them in.
Great teacher.
Very cool! Are these shapes meant to be taken literally? Sorry, had to make a pun :)
Can you make a video explaining how to get from just one logic gate to a full working cpu
Need to think on that.
@@MathAndScience it been done before on TH-cam, but they skip steps, they just say “and you also have to do that” but for a dumb guy like me it is still a mystery if it’s not explained like how you make videos, not missing anything, (btw, you can use riskV architecture it’s open source)
Higher and higher 👉👉🖕🖕🖕👉🏄🏄🏄🏄🏄👉🖕🖕👉🐇💗🎸👉👉🐇🙏🐇🎸🛁👉🐇🙏🐇🎸🛏️👉👉🐇🙏👉🐇💆🎸👉👉🙏🙏🙏🙏💥
Ty. 618 km / s = 384 miles / s
7.66 km / s = 4.76 Miles / s
wish you the best can you do something related to transformers
Nice 👍 🚀
I used to wonder why i cant go up slowly, what would stop me from go out of the planet eventually. Turn out i can do that because my understanding of escape velocity was off.
so did this video help you understand that correctly or confused you even more ? If yes, can you point me to the timestamp ?
@@rockwithyou2006 it does not help me more than i already understood. I figured it out long time ago
I put 2 steel balls 1 kg each, with their skins 1 mm apart, on a horizontal, thick glass plate. There's no attraction at all. Is it because Newton's concept of mass attracting another separate mass doesn't exist?
I have a thought on your fair question. Gravity is sometimes noted as a weak force as compared to a magnetic or electric force. Mass has to be huge to have a noticable amount of gravity. The balls are attracting each other, but the gravitational force isn't enough to overcome the friction caused by the weight of the balls on the glass.
@@mathization I made the statement so that astronuts can look at their physics books and calculate the force of attraction. And then realize that it doesn't exist.
The gravitational force between two steel balls - 1 kg each - sitting 1 mm apart is :
0.000066743 Newtons.
The friction they each experience greatly exceeds that. They aren't coming together......sorry to burst your bubble....
If you did this in free space with absolutely zero friction, it would take a tad bit over 2 hours for the two 1 kg balls to collide from 1 mm apart. And this again - ignores ALL friction or other forces. If the balls are sitting on glass - - the friction alone will overcome the tiny gravitational force between them.
The problem people like you have is not understanding the vast difference between YOUR mass and the mass of the EARTH. It's not two 1 kg balls. It's you - - - average person - - - with a mass of about 70 kg - - - and the mass of the Earth - - - at about 5.97*10^24 kg....or... 5,970,000,000,000,000,000,000,000 kg. There's kind of a difference there......
I looked at my physics book.....20 years ago. Did you look at yours? Can you even explain how I arrived at the 0.000066743 figure? I doubt it. You don't know what the fuck you're talking about.
not true. The two steel balls of 1KG are far apart (yes 1 mm is very far) for them to pull each other enough to escape the rolling friction between the balls and the glass plate. But the 1Kg ball also has a gravitational pull which is very very feeble due to its low mass.
Milky way🌌🌌🌌 to infinity and beyond man are from Mars 🥳🚀🤧women are from Venus🤦
Indians had calculated the orbital shapes before Kepler
i dont quite get it......... rockets go up........ not off a mnt top parallel to the surface.
They go up for a very short amount of time then turn over and go towards the horizon.
Sir
Thank you very much this is broadening my horizons, I appreciate your videos, I learn so much from it. I have a small request can you be kind enough when you have some free time to make a video on comets and how they work, Also is there a possibility that some object in this universe orbit multiple star systems or galaxies?
Great suggestion!
My lobes hurt 😄
👍❤🌷🌷❤👍
So my Guy Fawkes Bonfire rocket has no chance of hitting the Moon. For non Brits - Guy Fawkes Bonfire is our annual firework display in November each year.
In case people were not aware. There is ZERO empirical physics in this video justifying the theory of 'escape velocity'. . In fact it is a complete joke.
Thank you. This video is kind of a joke. Nowhere it defines escape velocity correctly.