Illustrates how to use Newton's second law to solve circular motion problems. For a complete index of these videos visit http://www.apphysicslectures.com
@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.
For the satellite problem, why do you square the term (2Re)?
brunohakalug1 1 day ago
i just wasted 9:23 mins of my life
aassxxaa1 1 month 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
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
I was just writing down that formula for speed then u said it changes .....
madhawarock 3 months ago
thankyou so much for this video
monta1994 3 months ago
@angelsassin G = 9.8
Memieko 3 months ago
You can substitute g=G(M_E/R_E^2) into the result to clean it up a bit
cameronm256 3 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
@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