Hi, i am just a student but i think that i can help you some in math, physics, Calculus, if you need help, please post you it, I am not a master, but i know that i will do my best helping you, or there must be another here in the forum that may help.
I offer my help! in math, physics, Calculus
| albusa wrote: |
| Hi, i am just a student but i think that i can help you some in math, physics, Calculus, if you need help, please post you it, I am not a master, but i know that i will do my best helping you, or there must be another here in the forum that may help. |
I'm always willing to try and help, within my limitations of course.
Considering gravity has not only a vertical component, but also a horizontal component, lending at least some normalcy in that gravity is always pulling down and toward the west, how would you calculate the angle and trajectory of a projectile with a given weight and aerodynamic properties to hit a known target at a known distance?
| S3nd K3ys wrote: |
| Considering gravity has not only a vertical component, but also a horizontal component, lending at least some normalcy in that gravity is always pulling down and toward the west, how would you calculate the angle and trajectory of a projectile with a given weight and aerodynamic properties to hit a known target at a known distance? |
Depends,
Factors that need to be known.
Weight of vehicle (minus fuel)
Initial weight of fuel
Fuel burn rate
Distance and direction to target
Is the vehicle completely ballistic? No control? Lift producing? Symmetry?
Drag of the vehicle throughout the trip.
Length of time will determine is you need to calculate the rotation of the Earth.
Range of given fuel could affect the launch angle.
Loads of sources on the net or just hit the library.
What have I forgotten, guys?
| HoboPelican wrote: | ||
Depends, Factors that need to be known. Weight of vehicle (minus fuel) Initial weight of fuel Fuel burn rate Distance and direction to target Is the vehicle completely ballistic? No control? Lift producing? Symmetry? Drag of the vehicle throughout the trip. Length of time will determine is you need to calculate the rotation of the Earth. Range of given fuel could affect the launch angle. Loads of sources on the net or just hit the library. What have I forgotten, guys? |
Weight is a constant.
No fuel. Catapult. So I guess that would be enertia, which could also be a constant.
Distance is a constant. No wait, it might be a variable. Yes. A variable. Gots to be mobile.
Burn rate is not applicable, no fuel. Launch velocity and accelleration may be, though. That would be a constant I guess. Referr to 'fuel' above.
Nonbalistic, no control, non lift producing, symetrical.
Drag will be a variable given the properties of barametric preasure at different altitudes. (I think :headscratch: )
Anything else you need?
Last edited by S3nd K3ys on Tue Aug 08, 2006 8:08 pm; edited 1 time in total
| S3nd K3ys wrote: |
| Considering gravity has not only a vertical component, but also a horizontal component, lending at least some normalcy in that gravity is always pulling down and toward the west, how would you calculate the angle and trajectory of a projectile with a given weight and aerodynamic properties to hit a known target at a known distance? |
I'm not sure about the original premis. Gravity, to my knowledge, has no horizontal component....
C
| Bikerman wrote: | ||
I'm not sure about the original premis. Gravity, to my knowledge, has no horizontal component.... C |
http://www.google.com/search?q=horizontal+gravity+component&start=0&ie=utf-8&oe=utf-8&client=firefox-a&rls=org.mozilla:en-US:official
| S3nd K3ys wrote: | ||||
Weight is a constant. No fuel. Catapult. So I guess that would be enertia, which could also be a variable Distance is a constant Burn rate is not applicable, no fuel. Launch velocity and accelleration may be, though. That would be a constant I guess. Referr to 'fuel' above. Nonbalistic, no control, non lift producing, symetrical. Drag will be a variable given the properties of barametric preasure at different altitudes. (I think :headscratch: ) Anything else you need? |
I forgot wind and atmos conditions. But if this just something simple like a funnelator, it's pretty basic. Basic equations of motion should do the trick.
Try here. If you have problems, PM me and I can walk you through the basics.
Edit: Link got lost
http://id.mind.net/~zona/mstm/physics/mechanics/curvedMotion/projectileMotion/generalSolution/generalSolution.html
Last edited by HoboPelican on Tue Aug 08, 2006 9:59 pm; edited 1 time in total
| S3nd K3ys wrote: | ||||
http://www.google.com/search?q=horizontal+gravity+component&start=0&ie=utf-8&oe=utf-8&client=firefox-a&rls=org.mozilla:en-US:official |
And that link shows what exactly ? That the term gets some hits on google ? So do many things which have no existence.....
C.
| S3nd K3ys wrote: |
| Considering gravity has not only a vertical component, but also a horizontal component, lending at least some normalcy in that gravity is always pulling down and toward the west, how would you calculate the angle and trajectory of a projectile with a given weight and aerodynamic properties to hit a known target at a known distance? |
I repeat my earlier comment - I don't think there is such a component.
I am familiar with classical mechanics and dynamics and in my experience gravity is considered to be a field/force acting from the centre of mass and towards that centre of mass. There is only one component - the vertical one - unless you are considering direction relative to the object being acted upon rather than relative to the objext acting, in which case it is a simple trigonometry problem...
C.
| Bikerman wrote: | ||
I repeat my earlier comment - I don't think there is such a component. I am familiar with classical mechanics and dynamics and in my experience gravity is considered to be a field/force acting from the centre of mass and towards that centre of mass. There is only one component - the vertical one - unless you are considering direction relative to the object being acted upon rather than relative to the objext acting, in which case it is a simple trigonometry problem... C. |
:sigh:
| S3nd K3ys wrote: |
|
:sigh: |
If I'm wrong then say so....I'm always willing to learn...
| Bikerman wrote: | ||
If I'm wrong then say so....I'm always willing to learn... |
I'm sorry if I didn't come out and say it, but YOU'RE WRONG...
http://www.google.com/search?q=horizontal+gravity+component&start=0&ie=utf-8&oe=utf-8&client=firefox-a&rls=org.mozilla:en-US:official
| S3nd K3ys wrote: | ||||
I'm sorry if I didn't come out and say it, but YOU'RE WRONG... http://www.google.com/search?q=horizontal+gravity+component&start=0&ie=utf-8&oe=utf-8&client=firefox-a&rls=org.mozilla:en-US:official |
Please refer me to a site or specific reference....a google search result is, as I said earlier, indicative of nothing. If you examine the results on your quoted search you will see that most of them do not refer to any horizontal component of gravity, and those that do (I found 2) are referring to something else entirely;...
Guys, that's enough, ok?
SK, he is right. The only time I can think of gravity having a horizontal component is if you are in a hole or near a very large mountain. It's negligible in any normal situtaion.
Bikerman, I think SK is maybe thinking of oribtal problems where the gravity vector is broken down for ease of calculation, perhaps?
For all intents and purposes, consider the bodies to be point sources of mass.
SK, he is right. The only time I can think of gravity having a horizontal component is if you are in a hole or near a very large mountain. It's negligible in any normal situtaion.
Bikerman, I think SK is maybe thinking of oribtal problems where the gravity vector is broken down for ease of calculation, perhaps?
For all intents and purposes, consider the bodies to be point sources of mass.
| HoboPelican wrote: |
|
SK, please, let it go. What you are seeing on the net is simply a way to work grav problems when you are not near a huge gravity source like the earth. For your problem there is no horizontal component to worry about. You have a horizontal ground and the force acts downward. |
Ok. I'll let it go. There's really no horizontal component to gravity
*cough*bs*cough* There is, but it's effect is minimal and likely not measurable
| Quote: |
| I am willing to help you out in PM. |
No thanks, I don't need the formula, I was trying to give the thread starter something fun to work on.
Last edited by S3nd K3ys on Tue Aug 08, 2006 10:19 pm; edited 4 times in total
Pointless arguments removed.
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