Under what conditions does the phenomenon of weightlessness occur?

Weightlessness is a state of the body in which the weight of the body is zero.
The weight of a body is the force with which this body presses on the support or stretches the suspension. If you remove the support or suspension, then for the body this will be the state of weightlessness.
In other words, this is the movement of the body only under the influence of one force – the force of gravity.
At the moment of a jump, when a person is in the air, this is already a state of weightlessness.

One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.