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mikelewis

(4,184 posts)
24. Here's My and AI's physics.... please apply real physics and fix this please...
Wed Dec 6, 2023, 07:43 AM
Dec 2023

I took the liberty of asking AI to do it... I know you implied that both AI and I have no idea what we are doing and I have to accept that since you have a doctorate you must be right... please help me fix this math.


from AI:

To analyze this scenario, let's set up some assumptions for the railgun system, the tethered projectile, and the platform. We'll also consider the dynamics involved in firing and capturing the projectile.

Assumptions and Setup:

Projectile Weight: 10 ounces (about 0.283 kg).
Projectile Velocity: 5 m/s.
Tether Length: Let's assume a practical length of 10 meters. The tether must be strong enough to handle the forces without breaking.
Railgun Setup: Two railguns to offset gyroscopic effects, positioned opposite each other.
Platform and Battery Weight: Let's assume the platform (including railguns and battery) has a total mass of 100 kg for simplicity.
Catching Mechanism: The projectile is stopped by a magnet for efficient energy transfer.
Calculating the Recoil:

When the projectile is fired, the platform will experience a recoil in the opposite direction, according to the conservation of momentum.
Dynamics of the Arc and Catching the Projectile:

As the tethered projectile is fired, it will create an arc and potentially cause the platform to rotate. However, having two railguns firing simultaneously in opposite directions can balance out this rotational force.
Stopping the projectile at 180 degrees with a magnet will transfer its momentum to the platform. This action will either add to the platform's momentum (if it's moving in the same direction) or reduce it (if moving in the opposite direction).
Calculating Movement in Space:

We need to calculate the recoil velocity of the platform when the projectile is fired and when it's caught.
Let's start with the recoil velocity when the projectile is fired. We'll use the conservation of momentum, which states that the total momentum before firing (which is zero, as the system is initially at rest) is equal to the total momentum after firing.

Error analyzing
python
Copy code
# Given data
mass_projectile = 0.283 # in kg (10 ounces)
velocity_projectile = 5 # in m/s
mass_platform = 100 # in kg (platform + railguns + battery)

# Conservation of momentum for recoil velocity
# Initial momentum is 0, so final momentum of platform = - final momentum of projectile
# 0 = mass_platform * velocity_platform + mass_projectile * velocity_projectile
# Solving for velocity_platform
velocity_platform_recoil = -(mass_projectile * velocity_projectile) / mass_platform

velocity_platform_recoil # This is the recoil velocity of the platform after the projectile is fired
The recoil velocity of the platform after the projectile is fired is approximately
?
0.01415
?0.01415 m/s. This negative sign indicates the direction is opposite to the projectile's motion.

Next Steps in the Thought Experiment:

After firing, the projectile moves outwards on the tether, creating an arc. If the railguns are positioned and timed correctly, they can counteract any rotational forces, keeping the platform stable.
When the projectile reaches 180 degrees and is caught by the magnet, its momentum is transferred to the platform. This will either add to the platform's momentum (if it's moving in the same direction) or reduce it (if moving in the opposite direction).
For the projectile being caught, the situation is more complex due to the rotational dynamics and the transfer of momentum at the end of the tether. The momentum transfer would depend on the angle and speed at which the projectile is caught, as well as the tether's dynamics.

Considerations in Real-World Application:

In a practical scenario, the efficiency of transferring momentum from the projectile to the platform would not be 100%. Some energy would be lost due to factors like the elasticity of the tether, structural vibrations, and any misalignment in the catching mechanism.
The system would need precise control to manage the timing and alignment of the railguns and the catching mechanism.
This thought experiment highlights a unique approach to propulsion in space, using principles of momentum and rotational dynamics. It's a complex system that would require careful engineering to implement effectively, especially in the microgravity and vacuum of space. ​



So you can see my problem... no? I can't fix my math. It always comes out that the thing is moving. Help me fix that please.
AI's reply mikelewis Dec 2023 #1
The reason it mentioned Saturn... mikelewis Dec 2023 #4
The Math mikelewis Dec 2023 #2
Follow up Question... Speed in mph over multiple reloads? mikelewis Dec 2023 #7
Your "math" is unreadable. You can do actual formatting or images. Until then, it's unusable. . . . nt Bernardo de La Paz Dec 2023 #63
I apologize for that but if you copy and paste the things I said into AI it will fix that for you... mikelewis Dec 2023 #67
No Bernardo de La Paz Dec 2023 #69
Why this is inline with physics mikelewis Dec 2023 #3
System Design and Equation from the book mikelewis Dec 2023 #5
reminds me of project orion AllaN01Bear Dec 2023 #6
That one actually sounds more terrifying LOL! Glad that got scrubbed... this is totally different mikelewis Dec 2023 #10
Is this bullet/slug a physical item, with form and substance? oldfart73 Dec 2023 #8
Yes, you would ideally use a giant magnet... something weighing about 50 lbs... accelerated to about 2500 m/s... mikelewis Dec 2023 #11
Then it would require a mechanism to catch it and reposition it for reuse. oldfart73 Dec 2023 #13
Absolutely... this design is an engineering nightmare... mikelewis Dec 2023 #16
However... you could catch it in another railgun... mikelewis Dec 2023 #17
It takes energy to change the direction of the slugs. indigoth Dec 2023 #9
That isn't quite correct... Try this... mikelewis Dec 2023 #12
Nope indigoth Dec 2023 #18
Sorry... that's not remotely correct mikelewis Dec 2023 #19
No. It doesn't. indigoth Dec 2023 #25
You are exactly right... there is no angular momentum when it's shot... mikelewis Dec 2023 #28
Perhaps the final nail in the coffin indigoth Dec 2023 #29
Really? So let's prove this mathematically... mikelewis Dec 2023 #30
Oh please indigoth Dec 2023 #37
Wonderful... do the math then... this is all basic stuff... mikelewis Dec 2023 #38
Starting at rest indigoth Dec 2023 #39
Where's the math? mikelewis Dec 2023 #40
I did make zero equal zero indigoth Dec 2023 #41
Weak... no proof nonsense mikelewis Dec 2023 #42
Well then, indigoth Dec 2023 #43
No... I'm talking to you... mikelewis Dec 2023 #44
And to your point about NASA. mikelewis Dec 2023 #45
The short (and absolutely correct) answer is indigoth Dec 2023 #46
Well... why not really take a look at what I am saying before you continue on that stance... mikelewis Dec 2023 #47
This is correct relayerbob Dec 2023 #57
Wrong perspective. To inject angular momentum into bullet, it sucks linear momentum Bernardo de La Paz Dec 2023 #64
And as a backup... the same explanation AI style mikelewis Dec 2023 #20
One important note... AI gets the answer wrong here... and I fix it. mikelewis Dec 2023 #21
Your scheme is not fully thought out. It fails Bernardo de La Paz Dec 2023 #61
IMHO The bullets will never hit you Cheezoholic Dec 2023 #14
Well... the masses are different... mikelewis Dec 2023 #15
Physics PhD here - can't work. caraher Dec 2023 #22
Ok... you are correct... this is a poor design... let's fix that... mikelewis Dec 2023 #23
Here's My and AI's physics.... please apply real physics and fix this please... mikelewis Dec 2023 #24
And here's the final velocity... please help me make that Zero 0 mikelewis Dec 2023 #26
rec ed as something worth thinking about, but rampartc Dec 2023 #27
According to the limited physics I understand... that momentum is conserved once it begins it's rotation... mikelewis Dec 2023 #31
I ask AI to review that statement... this is the response... mikelewis Dec 2023 #32
I accentuate this effect by cutting the radius... mikelewis Dec 2023 #33
An explanation as to why this works... mikelewis Dec 2023 #34
Nice thought experiment but. EmeraldCoaster Dec 2023 #35
Saying it doesn't prove it mikelewis Dec 2023 #36
Your math is unreadable. You haven't proven anything. . . . . nt Bernardo de La Paz Dec 2023 #65
I am not proving anything. I am asking... mikelewis Dec 2023 #68
Force is not "absorbed" Bernardo de La Paz Dec 2023 #70
If you aren't proving anything, why the in-your-face belligerence commanding repliers to prove things? Bernardo de La Paz Dec 2023 #71
Why don't actual rocket scientists use this propulsion system? Ptah Dec 2023 #48
We don't know if it works or not... mikelewis Dec 2023 #50
I think I found a demonstration of your model. Ptah Dec 2023 #52
Clearly you didn't read any of this... mikelewis Dec 2023 #55
Will you provide a better illustration of your proposal? Ptah Dec 2023 #56
One hears these sort of things, and one doesn't want to believe it. NNadir Dec 2023 #49
Ok... there is no claim that this is perpetual motion... there are power supplies and limits to the length of runtime... mikelewis Dec 2023 #51
I would suggest taking a physics course. NNadir Dec 2023 #53
Well... your mathematical proofs will be fine... mikelewis Dec 2023 #54
Whatever. NNadir Dec 2023 #59
DU can do without personal slams like you writing "running your mouth to feel better". . . . . nt Bernardo de La Paz Dec 2023 #62
Only works if you violate several laws of physics relayerbob Dec 2023 #58
This thread is a great example on how AI chats can create utter nonsense and make it look good. unblock Dec 2023 #60
Ahead full impulse, Mr. Sulu DoBW Dec 2023 #66
Let's make this real simple... mikelewis Dec 2023 #72
AI's response mikelewis Dec 2023 #73
Please correct the AI mistakes here... mikelewis Dec 2023 #74
Why argue with you? We explain things but then you get belligerent Bernardo de La Paz Dec 2023 #75
Post removed Post removed Dec 2023 #76
Please take a course in physics! CloudWatcher Dec 2023 #77
What exactly is your educational background, anyway? NickB79 Dec 2023 #78
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