| General > General Technical Chat |
| Electroboom: How Right IS Veritasium?! Don't Electrons Push Each Other?? |
| << < (125/148) > >> |
| electrodacus:
--- Quote from: gnuarm on July 17, 2022, 11:16:03 pm ---Dude! Reality is only a concept to you, something you are free to wrap around your finger. You wouldn't know reality if it smacked you in the face. You know as well as anyone that the sails are in the wind when on the top side and are furled and not in the wind on the bottom side. The wind, as well as your little balls, get into the sails and push the car along all day long. LOL You clearly either have a mental illness, or are just trolling. I think you are just a troll. You get off on trying to jerk people... I mean around. Who cares. The sail experiment is very clear and shows how, in very simple terms that pretty much any idiot can understand, that a vehicle can travel faster than the wind. A person has to be very "special" to not understand the factors involved. "Special" indeed. --- End quote --- You just fail to understand wind direction relative to vehicle is what is important and that is 5m/s headwind instead of tailwind (5m/s-10m/s) I guess an "idiot" will think is simple and he understood. As I mentioned before likely I will not be able to help you. |
| Naej:
--- Quote from: electrodacus on July 17, 2022, 10:30:49 pm --- --- Quote from: Naej on July 17, 2022, 09:57:02 pm ---The point was to have you admit that it is possible for a slow object to transfer its energy to a fast one. Which you said was impossible. --- End quote --- There was a cable connecting this two vehicles that needed to be longer and longer as the distance between the vehicle grows very fast. There is no cable between air particles and wind powered vehicle and the only way the air particle can transfer energy to vehicle is to hit the back of the vehicle (propeller or sail is at same speed as the vehicle and part of the vehicle). --- End quote --- Okay so you admit it is possible. --- Quote from: electrodacus on July 17, 2022, 10:30:49 pm --- --- Quote from: Naej on July 17, 2022, 09:57:02 pm ---Now truck A is at 10 m/s, truck B is at 11 m/s (both 10 tons). An electric bike (200kg, driver is Carrie-Anne Moss) is on truck B and at 10 m/s (with respect to the ground), so that it can jump on truck A. Once on truck A, it accelerates with its 10kW engine during 1s, and jumps on truck B. (Moss is now at 20 m/s with respect to the ground) On truck B, the bike uses regenerative breaking until it stops at 10kW, which gives 8100J to the bike during 0.81 s. The bike is recharged with a generator on truck B wheels, by exactly 2000J. Now the bike is turned around and back at 10 m/s (with respect to ground), which it can do with the 100J remaining. And the cycle can repeat, with truck A'. Question: what is the kinetic energy of truck B? You just have to compute what was given to truck B by Moss when breaking, and remove the 2000J. Or compute the decrease in kinetic energy of truck A. --- End quote --- This is one of the most ridiculous things I heard. Air particles and direct downwind vehicle interaction can only be air particle collides with vehicle and transfers kinetic energy to vehicle. As air is a compressible fluid a higher number of air particles will bunch up in the back of the vehicle and a lower number will be in front thus a pressure differential. If you have a propeller like on blackbird you can use wind energy (while well below wind speed) to keep this pressure differential from dropping and so basically store energy in this pressure differential. All you have is potential wind energy which is 0.5 * vehicle mass * (wind speed)2 For a sail vehicle you can convert this to vehicle kinetic energy so you trade the potential energy for kinetic energy and the vehicle can not exceed wind speed. For blackbird direct downwind version you start with the same potential wind energy but as you start to convert that to kinetic energy part of it instead of converting into kinetic energy will be put back to increase the potential wind energy. Of course as vehicle slowly accelerates there is less wind power available and at some point well before vehicle gets at wind speed the stored potential energy is used up to accelerate the vehicle so pressure differential will continue to drop but before it gets to zero it accelerated the vehicle well above wind speed then vehicle just starts to slow down. So to use your analogy all you need is vehicle A and a generator connected to a battery. Without the generator and battery vehicle A can best case get to wind speed as it is pushed by air particles. With the generator instead of accelerating the energy from wind is stored in to battery so more time is spent at low vehicle speed and then that stored battery energy is converted in to vehicle kinetic energy. --- End quote --- Why are you speaking about wind? What is the kinetic energy of truck A and truck B after the maneuver, which put the battery level back to its original position? Is truck B faster than it used to be, and truck A slower? (Remember that a bike accelerated on truck A and Newton's third law) |
| electrodacus:
--- Quote from: Naej on July 17, 2022, 11:52:30 pm ---Why are you speaking about wind? What is the kinetic energy of truck A and truck B after the maneuver, which put the battery level back to its original position? Is truck B faster than it used to be, and truck A slower? (Remember that a bike accelerated on truck A and Newton's third law) --- End quote --- There is nothing the equivalent of an electric cable or an electric bicycle between the air particles and the direct down wind vehicle. The only way vehicle A can increase the kinetic energy of vehicle B is if the vehicle B is slower so that vehicle A can bump in to it. You are trying to find a way so that a vehicle directly downwind faster than wind can still be powered by wind and that is just impossible. What you are proposing is like this: A wind turbine fixed on the ground connected with a long cable to a vehicle that then uses that always available energy to accelerated faster than wind direct down wind. And second option a cyclist commuting back in forth below wind speed to store some energy then above wind speed to deliver that stored energy to vehicle. |
| Naej:
--- Quote from: electrodacus on July 18, 2022, 12:04:59 am --- --- Quote from: Naej on July 17, 2022, 11:52:30 pm ---Why are you speaking about wind? What is the kinetic energy of truck A and truck B after the maneuver, which put the battery level back to its original position? Is truck B faster than it used to be, and truck A slower? (Remember that a bike accelerated on truck A and Newton's third law) --- End quote --- There is nothing the equivalent of an electric cable or an electric bicycle between the air particles and the direct down wind vehicle. The only way vehicle A can increase the kinetic energy of vehicle B is if the vehicle B is slower so that vehicle A can bump in to it. --- End quote --- Who talked about "bumping"? Only you. You just need to disconnect wires with the slower vehicle and connect them to the next one, also slower but in front of you. --- Quote from: electrodacus on July 18, 2022, 12:04:59 am ---You are trying to find a way so that a vehicle directly downwind faster than wind can still be powered by wind and that is just impossible. What you are proposing is like this: A wind turbine fixed on the ground connected with a long cable to a vehicle that then uses that always available energy to accelerated faster than wind direct down wind. And second option a cyclist commuting back in forth below wind speed to store some energy then above wind speed to deliver that stored energy to vehicle. --- End quote --- What is the kinetic energy of truck A and truck B after the maneuver, which put the battery level back to its original position? Is truck B faster than it used to be, and truck A slower? (Remember that a bike accelerated on truck A and Newton's third law) |
| PlainName:
--- Quote from: gnuarm on July 17, 2022, 11:16:03 pm --- --- Quote from: electrodacus on July 17, 2022, 06:36:49 pm ---The fact that you fail to see that sails are attached to vehicle so they move at the same speed relative to the ground in average makes you unable to predict the outcome. --- End quote --- LOL You clearly either have a mental illness, or are just trolling. I think you are just a troll. You get off on trying to jerk people... I mean around. --- End quote --- Yep, I think that bit unequivocally proves he is a first class troll. |
| Navigation |
| Message Index |
| Next page |
| Previous page |