Mixing
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Is the person in this video explaining it wrong?
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up vote
2
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Here's the link! to the video.
Watch @3:30, this person resolves the momentum vector into two components , tangential and radial. But the velocity at every point on the orbit must be tangential right? Is it not so?
newtonian-mechanics kinematics orbital-motion vectors
edited 3 hours ago
Qmechanic♦
98.5k121741074
asked 4 hours ago
Mike Victor
193
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up vote
2
down vote
favorite
Here's the link! to the video.
Watch @3:30, this person resolves the momentum vector into two components , tangential and radial. But the velocity at every point on the orbit must be tangential right? Is it not so?
newtonian-mechanics kinematics orbital-motion vectors
edited 3 hours ago
Qmechanic♦
98.5k121741074
asked 4 hours ago
Mike Victor
193
New contributor
Mike Victor is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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Does the statement "the velocity at every point on the orbit must be tangential" apply to elliptical orbits?
– Arturs C.
3 hours ago
1
Possible duplicate: physics.stackexchange.com/q/349811/2451
– Qmechanic♦
3 hours ago
@ArtursC. Yes,it does!
– ayc
2 hours ago
add a comment |Â
up vote
2
down vote
favorite
up vote
2
down vote
favorite
Here's the link! to the video.
Watch @3:30, this person resolves the momentum vector into two components , tangential and radial. But the velocity at every point on the orbit must be tangential right? Is it not so?
newtonian-mechanics kinematics orbital-motion vectors
edited 3 hours ago
Qmechanic♦
98.5k121741074
asked 4 hours ago
Mike Victor
193
New contributor
Mike Victor is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
Here's the link! to the video.
Watch @3:30, this person resolves the momentum vector into two components , tangential and radial. But the velocity at every point on the orbit must be tangential right? Is it not so?
newtonian-mechanics kinematics orbital-motion vectors
newtonian-mechanics kinematics orbital-motion vectors
edited 3 hours ago
Qmechanic♦
98.5k121741074
asked 4 hours ago
Mike Victor
193
New contributor
Mike Victor is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
edited 3 hours ago
Qmechanic♦
98.5k121741074
asked 4 hours ago
Mike Victor
193
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Mike Victor is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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edited 3 hours ago
Qmechanic♦
98.5k121741074
edited 3 hours ago
Qmechanic♦
98.5k121741074
edited 3 hours ago
Qmechanic♦
98.5k121741074
98.5k121741074
asked 4 hours ago
Mike Victor
193
New contributor
Mike Victor is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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asked 4 hours ago
Mike Victor
193
asked 4 hours ago
Mike Victor
193
193
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Mike Victor is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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New contributor
Mike Victor is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
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Check out our Code of Conduct.
Does the statement "the velocity at every point on the orbit must be tangential" apply to elliptical orbits?
– Arturs C.
3 hours ago
1
Possible duplicate: physics.stackexchange.com/q/349811/2451
– Qmechanic♦
3 hours ago
@ArtursC. Yes,it does!
– ayc
2 hours ago
add a comment |Â
Does the statement "the velocity at every point on the orbit must be tangential" apply to elliptical orbits?
– Arturs C.
3 hours ago
1
Possible duplicate: physics.stackexchange.com/q/349811/2451
– Qmechanic♦
3 hours ago
@ArtursC. Yes,it does!
– ayc
2 hours ago
Does the statement "the velocity at every point on the orbit must be tangential" apply to elliptical orbits?
– Arturs C.
3 hours ago
Does the statement "the velocity at every point on the orbit must be tangential" apply to elliptical orbits?
– Arturs C.
3 hours ago
1
1
Possible duplicate: physics.stackexchange.com/q/349811/2451
– Qmechanic♦
3 hours ago
Possible duplicate: physics.stackexchange.com/q/349811/2451
– Qmechanic♦
3 hours ago
@ArtursC. Yes,it does!
– ayc
2 hours ago
@ArtursC. Yes,it does!
– ayc
2 hours ago
add a comment |Â
1 Answer
1
active
oldest
votes
up vote
3
down vote
I think it's just a misunderstanding!
But the velocity at every point on the orbit must be tangential right?
Yes,it is and that's why the actual momentum vector is tangential to the ellipse
this person resolves the momentum vector into two components , tangential and radial
And yes he did.But,you should notice that he called one radial and the other perpendicular i.e the resolution is done according to the line joining the object's(planet's) location and sun and the object has radial velocity because radial velocity is defined as the component of the object's velocity that points in the direction of the radius connecting the object and the point.
And if you look at what you are calling as tangential velocity you would notice that this component, i.e perpendicular to line joining planet and sun, isn't tangential to the ellipse.It's just perpendicular to the line joining the planet and the ellipse.
Conclusion: The planet always has velocity tangential to the ellipse and the velocity perpendicular to the line joining planet and object isn't tangential to the ellipse at all instants.
Note:
Although in your question you particularly ask about momentum I just used the term velocity rather than momentum because I think it is easier to understand this way.
If you need momentum at any instant just multiply total velocity with mass(p=mv)
References:
https://en.wikipedia.org/wiki/Radial_velocity
https://www.youtube.com/watch?v=Pa3Of_3vpRc
answered 3 hours ago
ayc
916
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ayc is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
3
down vote
I think it's just a misunderstanding!
But the velocity at every point on the orbit must be tangential right?
Yes,it is and that's why the actual momentum vector is tangential to the ellipse
this person resolves the momentum vector into two components , tangential and radial
And yes he did.But,you should notice that he called one radial and the other perpendicular i.e the resolution is done according to the line joining the object's(planet's) location and sun and the object has radial velocity because radial velocity is defined as the component of the object's velocity that points in the direction of the radius connecting the object and the point.
And if you look at what you are calling as tangential velocity you would notice that this component, i.e perpendicular to line joining planet and sun, isn't tangential to the ellipse.It's just perpendicular to the line joining the planet and the ellipse.
Conclusion: The planet always has velocity tangential to the ellipse and the velocity perpendicular to the line joining planet and object isn't tangential to the ellipse at all instants.
Note:
Although in your question you particularly ask about momentum I just used the term velocity rather than momentum because I think it is easier to understand this way.
If you need momentum at any instant just multiply total velocity with mass(p=mv)
References:
https://en.wikipedia.org/wiki/Radial_velocity
https://www.youtube.com/watch?v=Pa3Of_3vpRc
answered 3 hours ago
ayc
916
New contributor
ayc is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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add a comment |Â
up vote
3
down vote
I think it's just a misunderstanding!
But the velocity at every point on the orbit must be tangential right?
Yes,it is and that's why the actual momentum vector is tangential to the ellipse
this person resolves the momentum vector into two components , tangential and radial
And yes he did.But,you should notice that he called one radial and the other perpendicular i.e the resolution is done according to the line joining the object's(planet's) location and sun and the object has radial velocity because radial velocity is defined as the component of the object's velocity that points in the direction of the radius connecting the object and the point.
And if you look at what you are calling as tangential velocity you would notice that this component, i.e perpendicular to line joining planet and sun, isn't tangential to the ellipse.It's just perpendicular to the line joining the planet and the ellipse.
Conclusion: The planet always has velocity tangential to the ellipse and the velocity perpendicular to the line joining planet and object isn't tangential to the ellipse at all instants.
Note:
Although in your question you particularly ask about momentum I just used the term velocity rather than momentum because I think it is easier to understand this way.
If you need momentum at any instant just multiply total velocity with mass(p=mv)
References:
https://en.wikipedia.org/wiki/Radial_velocity
https://www.youtube.com/watch?v=Pa3Of_3vpRc
answered 3 hours ago
ayc
916
New contributor
ayc is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |Â
up vote
3
down vote
up vote
3
down vote
I think it's just a misunderstanding!
But the velocity at every point on the orbit must be tangential right?
Yes,it is and that's why the actual momentum vector is tangential to the ellipse
this person resolves the momentum vector into two components , tangential and radial
And yes he did.But,you should notice that he called one radial and the other perpendicular i.e the resolution is done according to the line joining the object's(planet's) location and sun and the object has radial velocity because radial velocity is defined as the component of the object's velocity that points in the direction of the radius connecting the object and the point.
And if you look at what you are calling as tangential velocity you would notice that this component, i.e perpendicular to line joining planet and sun, isn't tangential to the ellipse.It's just perpendicular to the line joining the planet and the ellipse.
Conclusion: The planet always has velocity tangential to the ellipse and the velocity perpendicular to the line joining planet and object isn't tangential to the ellipse at all instants.
Note:
Although in your question you particularly ask about momentum I just used the term velocity rather than momentum because I think it is easier to understand this way.
If you need momentum at any instant just multiply total velocity with mass(p=mv)
References:
https://en.wikipedia.org/wiki/Radial_velocity
https://www.youtube.com/watch?v=Pa3Of_3vpRc
answered 3 hours ago
ayc
916
New contributor
ayc is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
I think it's just a misunderstanding!
But the velocity at every point on the orbit must be tangential right?
Yes,it is and that's why the actual momentum vector is tangential to the ellipse
this person resolves the momentum vector into two components , tangential and radial
And yes he did.But,you should notice that he called one radial and the other perpendicular i.e the resolution is done according to the line joining the object's(planet's) location and sun and the object has radial velocity because radial velocity is defined as the component of the object's velocity that points in the direction of the radius connecting the object and the point.
And if you look at what you are calling as tangential velocity you would notice that this component, i.e perpendicular to line joining planet and sun, isn't tangential to the ellipse.It's just perpendicular to the line joining the planet and the ellipse.
Conclusion: The planet always has velocity tangential to the ellipse and the velocity perpendicular to the line joining planet and object isn't tangential to the ellipse at all instants.
Note:
Although in your question you particularly ask about momentum I just used the term velocity rather than momentum because I think it is easier to understand this way.
If you need momentum at any instant just multiply total velocity with mass(p=mv)
References:
https://en.wikipedia.org/wiki/Radial_velocity
https://www.youtube.com/watch?v=Pa3Of_3vpRc
answered 3 hours ago
ayc
916
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ayc is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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edited 2 hours ago
answered 3 hours ago
ayc
916
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ayc is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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answered 3 hours ago
ayc
916
answered 3 hours ago
ayc
916
916
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ayc is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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New contributor
ayc is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
ayc is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
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Mike Victor is a new contributor. Be nice, and check out our Code of Conduct.
Mike Victor is a new contributor. Be nice, and check out our Code of Conduct.
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Does the statement "the velocity at every point on the orbit must be tangential" apply to elliptical orbits?
– Arturs C.
3 hours ago
1
Possible duplicate: physics.stackexchange.com/q/349811/2451
– Qmechanic♦
3 hours ago
@ArtursC. Yes,it does!
– ayc
2 hours ago