It is not rather in the descending phase?Christophe wrote:Every horizontal axis centrifuge goes through a specific cancellation of the terrestrial field on its upper part ...
To simulate free fall, constant acceleration is required throughout the downward phase to cancel the weight of the test pieces. With a stepper motor to manage in PWM it must be possible.Gravity is the state of a system in which no acceleration, caused by gravitation or any other force, can be measured by an observer in the system in question1. This includes free fall situations, but also situations where the system is far enough away from any source of gravity that it can be overlooked. This situation results in an absence of weight (but the mass remains unchanged). fr.wikipedia.org/wiki/Impesanteur
On the other hand "to make them rotate until they feel the feeling of microgravity", I do not see too much. In the image provided we see a box with gears and tubes inside. ?
Do not confuse gravity and buoyancy.GuyGadebois wrote:In sufficiently salty water, your mass is the same but your weight can become zero (as in space).