It’s interesting that AI chose to create my image of a gravity propelled craft to look like your typical alien UFO.
Many people online have difficultly understanding that any force applied to an object uniformly will cancel out inertial effects. It doesn’t necessarily have to be gravity. It could be a strong enough magnetic field, or some undiscovered force we have yet to master.
When we think of a force applied to an object we typically think of kinetic energy. If I get in a vehicle and slam down the accelerator, Energy is taken from gasoline, in the form of pressure, to push pistons, which turn wheels, which pull the car along. The seat pushes on my back, my back pushes on my internal organs, and eventually the entire system is traveling at the same speed. If I’m unfortunate enough to drive into a wall, the entire process happens in reverse, although over a much smaller amount of time, and my organs contact my chest wall at whatever speed the car was traveling. This is because all speeds in this system were created through reaction. A force is applied, each object in the system reacts to the force, and there is a chain reaction. We feel acceleration because of this chain reaction.
Reactionless Systems
Another option is simply not to push, but rather to act on the system as a whole, instantly. The only forces that can do this are forces that transmit the force effect through matter, unencumbered by said matter. The options are rather limited in this respect. If we take a leap of faith and speculate that gravity is a controllable force and not an innate property of the universe, it becomes a great candidate. Another option could be extremely strong magnetic fields. I’m envisioning the magnetized frog experiments from decades ago. In an extremely strong magnetic field you could, in theory, magnetize the human body to such an extent that every part of you is pulled by the magnetic field at the same rate. A reactionless acceleration. These craft would still be destroyed if they were reacted on by an outside force, i.e. hitting a wall at 1000 miles per hour. As long as accelerations are a result of the crafts propulsion system, all should be ok.
I’ve had two encounters with orbs and neither time did they ever travel faster than a brisk walk, so I have no direct knowledge of fast traveling alien craft, but there are many reports from highly respected aviators on this matter. I’m not a physicist, but I do enjoy thinking, and believe people should partake in that more often. Hopefully this little article helped for the next time you find yourself in an unfortunate conversation about aliens and someone says “It’s impossible, Inertia.. etc”.
