1. Zero-G Flights The weightlessnessexperience Video

2. Definition of zero-G zero gravity –noun Physics . the condition in which the apparent effect of gravity is zero, as in the case of a body in free fall or in orbit.

3. Second newton law : 𝐹=𝑚𝑎 weight counterforce weight

4. The principle Video 1 foot = 0,3048 meter

5. Into the plane

6. The end Thankyoufor attention !

7. More explanation These are explaination for me to explain the principle, I willdeletethem ! Reduced weight in aircraft Airplanes have been used since 1959 to provide a nearly weightless environment in which to train astronauts, conduct research, and film motion pictures. Such aircraft are commonly referred by the nickname "Vomit Comet". To create a weightless environment, the airplane flies in a six-mile long parabolic arc, first climbing, then entering a powered dive. During the arc, the propulsion and steering of the aircraft are controlled such that the drag (air resistance) on the plane is canceled out, leaving the plane to behave as it would if it were free-falling in a vacuum. During this period, the plane's occupants experience about 25 seconds of weightlessness, before experiencing about 25 seconds of 2 g acceleration (twice their normal weight) during the pull-out from the parabola. A typical flight lasts around two hours, during which 50 parabolas are flown.