the condition that exist when an object is in free fall (the only force on the object is the gravity)
The experience of being in free fall. If you are in a satellite, elevator, or other free-falling object, then you have a weight of zero Newtons relative to that object.
(or "zero gravity") the condition when no force (such as weight) is sensed. Occurs in orbit or free fall, when gravity already produces its full acceleration and can produce no further effect.
1. A condition in which no acceleration, whether of gravity or other force, can be detected by an observer within the system in question. Any object failing freely in a vacuum is weightless, thus an unaccelerated satellite orbiting the earth is weightless although gravity affects its orbit. Weightlessness can be produced within the atmosphere in aircraft flying a parabolic flightpath. 2. A condition in which gravitational and other external forces acting on a body produce no stress, either internal or external, in the body.
Weightlessness (or free fall) is the state in which an object appears to have no weight (but the object's mass remains the same). During weightlessness, an object's gravitational pull is negligible (close to zero). See microgravity.
Weightlessness or microgravity is the experience (by people and objects) during free-fall, of having no apparent weight. Weightlessness in common spacecraft is not due to an increased distance from the earth; the acceleration due to gravity at an altitude of 100 km is only 3% less than at the surface of the earth.