General > General Technical Chat
Mess with your minds: A wind powered craft going faster than a tail wind speed.
<< < (91/285) > >>
electrodacus:

--- Quote from: bdunham7 on September 03, 2021, 06:22:50 pm ---Well, it could be heat or some other change in the potential energy of the wreckage of the car.  Anyhow, lets say the wall is in fact on frictionless rollers and is very heavy (say 100,000kg).  And presume a completely non-elastic collision. Are you saying that after the collision the 9Ws energy will be found as kinetic energy of the now very slowly moving wall?   |O

--- End quote ---

Yes that is exactly what I'm saying because that is what happens.
The 100 tone wall will move so slow that it will be hard to see and on top of that any real wheel able to handle that weight will have so large friction that those 9Ws will be wasted there super fast so wall will stop moving.
But in the ideal case where wheels will have no friction the wall will continue to move slowly


--- Quote from: bdunham7 on September 03, 2021, 06:22:50 pm ---And the fulcrum will supply a reaction force equal to the sum of both forces.  Same for the wheels.  You really are refuting Newton's laws!   :-DD

--- End quote ---

Sorry you are unable to get this not sure how to explain this better to you.
electrodacus:

--- Quote from: cgroen on September 03, 2021, 06:24:30 pm ---And that, my dear, is exactly why you should start to question yourself if you in fact are such a supreme person that knows everything MUCH better than ALL OTHER, or, maybe, just maybe, you could be wrong ?

--- End quote ---

I will have questioned myself if you (any of you) provided me with an explanation that worked and did not violate the energy conservation law.
bdunham7:

--- Quote from: electrodacus on September 03, 2021, 06:55:41 pm ---I will have questioned myself if you (any of you) provided me with an explanation that worked and did not violate the energy conservation law.

--- End quote ---
'

I believe this was asked before and I don't think you answered (just link it if you did).

What is the energy conservation law you are referring to?  Can you state the law fully?
electrodacus:

--- Quote from: IanB on September 03, 2021, 06:31:04 pm ---The G wheel is a generator. It only needs to turn on its axle to generate power, it doesn't need to move. Since the belt is moving it can turn the G wheel to generate power without the cart needing to move left or right. The power generated by the G wheel can be transferred to the M wheel, and as noted before, the M wheel can turn clockwise or anti-clockwise at any speed according to gearing. If we gear it to turn clockwise it can move the cart from left to right. With low gearing it can move the cart slowly, and this slow movement will require less power than was generated in the G wheel.

--- End quote ---

That is where the misunderstanding is.
The wheel if it had no friction will spin at same speed as the treadmill and so stay in the same place but no energy is extracted.
If the wheel is locked 0RPM then vehicle will move to the left at same speed as the treadmill.
If you are in between this two extreme cases so extraction energy from the wheel and putting part of it in to motor wheel to push the vehicle back will result in a slower movement from right to left as that is the only direction this vehicle can go if the only source of energy is the treadmill.
That is why I always say braking power or braking energy as that is what it happens to generator wheel.
Same way you are able to brake an EV by generating energy and put that in to vehicle battery.
electrodacus:

--- Quote from: bdunham7 on September 03, 2021, 07:02:27 pm ---I believe this was asked before and I don't think you answered (just link it if you did).

What is the energy conservation law you are referring to?  Can you state the law fully?

--- End quote ---

You can not create or destroy energy you can just convert it from one form to another.
So when you take 10Ws from the vehicle kinetic energy slowing the vehicle down you need to put all that back else end result will be a slower moving vehicle.
So if you take 10Ws from wheel and put only 7Ws in to propeller then you will end up with less speed and some heat from friction losses.
Navigation
Message Index
Next page
Previous page
There was an error while thanking
Thanking...

Go to full version
Powered by SMFPacks Advanced Attachments Uploader Mod