- #1
Suraj M
Gold Member
- 597
- 39
consider a body revolving around a star and having a velocity v when closest to the star ( distance r) then the velocity of the body at a point farthest ( distance R) is?
1)by angular momentum conservation ::
r × mv = R× mV
»V = (r/R).v
2) By centrifugal and gravitatinal force
v²/r = GM/r²
v² α 1/r
in this we can get V = (r/R)½ v
the angular momentum method is the right method ... but what am i missing out on from method no. 2??
1)by angular momentum conservation ::
r × mv = R× mV
»V = (r/R).v
2) By centrifugal and gravitatinal force
v²/r = GM/r²
v² α 1/r
in this we can get V = (r/R)½ v
the angular momentum method is the right method ... but what am i missing out on from method no. 2??