Gravitational Mass:Gravitational mass refers to the property of matter that determines the strength of its gravitational attraction towards other objects.
Acceleration:Acceleration is the rate at which an object changes its velocity over time. It depends on both the magnitude and direction of the applied force.
Weightlessness: Weightlessness occurs when an object experiences zero apparent weight due to being in freefall or experiencing negligible gravitational forces. It does not mean there is no gravity present, but rather that there are no normal contact forces acting on the object.