Lec 22 | 8.01 Physics I: Classical Mechanics, Fall 1999

Kepler's Laws - Elliptical Orbits - Satellites - Change of Orbits - Ham Sandwich

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Category:

Education

Tags:

• mit
• opencourseware
• physics
• mechanics
• lewin
• vectors
• motion
• gravity
• trajectory
• centripetal
• scalar
• friction
• tension

[PilotOfNorway91]

They're smart; NOT nerds. That's discrimination right there. He is actually interesting to listen to.

[coroboree]

An excellent presentation of orbital mechanics.

[willbirful]

brilliant video

[Yrda1]

Using a ham sandwich toss as an example is simply Engeniously peadagogic

[richyrich356]

how did i get here from pre-calc?!?!

[madcobrinho]

@AwesomeGameplay of course it does, this friction from air (drag force) is in reverse direction than velocity, so it does negative work on the ball ("steal" the energy from this system)

[taniatuning]

WTF I AM DOING HERE O_O

[AwesomeGameplay]

@madcobrinho well i'm not very smart. i just graduated high school. (i don't even know how i came upon this video) But i just wanna add that friction from the air would also slow the balls down, right?

[madcobrinho]

@axxo798 it would keep on goin forever if there was no loss of energy (idealised situation) in our world these balls will bounce away with smaller and smaller amplitude, because energy is lost for example in colliisions (heating balls up) or in emmiting acoustic wave (you can hear them hitting each other)

[ILYIAB]

Basic physics from MIT.

[FlashAstronomy]

@axxo798 It's called Newton's cradle

[wokeupthismorning100]

TL; DW (Too long; Didn't Watch)