Heater wrote:Give that rod and mass system a spin
What is involved in that? No less or more than applying a force, thus accelerating the mass into a rotational path. Resolve the applied force and you will end up with the centripetal component.
Think about the planet and satellite model and it becomes even more obvious. Stop the rotation by firing a rocket to reduce the tangential component of velocity (ie, reduce the spin), and the gravitational force is unaffected.Satelite orbit decays. Increase the spin by increasing the tangential velocity, the acceleration due to gravity is unaffected, so the satellite increases its distance from the planet.
Perhaps you should suggest to the Tranquility Project
people that, if instead of going into orbit, just going up without any rotation would stop the downwards acceleration, so the cost of fuel to get to the moon would be trivial.
"Thanks for saving my life." See https://www.raspberrypi.org/forums/viewtopic.php?p=1327656#p1327656
“Raspberry Pi is a trademark of the Raspberry Pi Foundation”