@KKEEAANNUU1994 The acceleration due to gravity decreases the further you are from Earth. g=9.81 only applies if you are close to the surface of the Earth.
@ACslater11 He's using the formula for the gravitational force between two masses. G is the gravitational constant, which I don't remember from off the top of my head. As the satellite revolves around the earth, it is the gravitational force between the satellite and the earth that keeps the satellite in orbit.
that'll be the equation for gravity,Fnet=Gm1me/r^2 (in this case r=2Re). guess that's just the one of the core thing you'll have to remember about satellite problems.
i just wasted 9:23 mins of my life
aassxxaa1 3 weeks ago
Cant you just use, acceleration (g=9.81) =V^2/r to make the last question much simpler? or is that essentially what you did?
KKEEAANNUU1994 2 months ago
@KKEEAANNUU1994 The acceleration due to gravity decreases the further you are from Earth. g=9.81 only applies if you are close to the surface of the Earth.
lemmingsgopop 2 months ago
I was just writing down that formula for speed then u said it changes .....
madhawarock 2 months ago
thankyou so much for this video
monta1994 2 months ago
You can substitute g=G(M_E/R_E^2) into the result to clean it up a bit
cameronm256 2 months ago
Thanks! This really helped me with my homework this morning. You're much better than my physics teacher, I'm a Senior in HS.
Claymobileation 3 months ago
thanks! you made it really clear!
CosmicTurban2 3 months ago
Why does the Fnet of the satellite = GMsMe/(2Re)^2? What is the G and why is it being divided by (2Re)^2 and not just Ms??
ACslater11 3 months ago
@ACslater11 He's using the formula for the gravitational force between two masses. G is the gravitational constant, which I don't remember from off the top of my head. As the satellite revolves around the earth, it is the gravitational force between the satellite and the earth that keeps the satellite in orbit.
angelsassin 3 months ago
@angelsassin G = 9.8
Memieko 2 months ago
love ya!
AnnaJsonify 4 months ago
Very good ! Thanks for sharing! I voted "like".
RescuePits1 4 months ago
vey nice. thanks man
junnatee 4 months ago
FANTASTIC explanation!!! Thanx, thanx, thanx...!
jesusclau1 4 months ago
what exactly is "this guy" at 7:53? the GM1M2? how is that the force?
MonsieurJ0oker 5 months ago
@MonsieurJ0oker
that'll be the equation for gravity,Fnet=Gm1me/r^2 (in this case r=2Re). guess that's just the one of the core thing you'll have to remember about satellite problems.
jdxk 4 months ago
I finally understand it! Thanks so much for putting these up here.
omgaify 10 months ago
You are such a good teacher - very eloquent.
joejacksonriley 1 year ago