e/Parabola of safety

Information
has gloss	eng: In classical mechanics and ballistics, the parabola of safety or safety parabola is the envelope of the parabolic trajectories of projectiles shot from a certain point with a given speed at different angles to horizon in a fixed vertical plane. The fact that this envelope is a parabola had been first established by Evangelista Torricelli and was later reproved by Johann Bernoulli using the infinitesimal calculus methods of Leibniz.
lexicalization	eng: Parabola of safety
instance of	(noun) (geometry) a curve generated by the intersection of a plane and a circular cone conic, conic section

Meaning
French
has gloss	fra: Soit un boulet B (lancé à une vitesse initiale Vo), tombant dans le vide, dans un champ de pesanteur uniforme g.
lexicalization	fra: Parabole de surete
lexicalization	fra: Parabole de sûreté