what is this type of energy mentioned?
Energy  held by an object because of its position relative to other objects, stresses within itself, its electric charge, or other factors.
Potential energy
In physics, potential energy is the energy held by an object because of its position relative to other objects, stresses within itself, its electric charge, or other factors.

how long does a glider stay in the air They can tay airborne for hours by flying through air that is ascending as fast or faster than the glider itself is descending, thus gaining potential energy. The most commonly used sources of rising air are what is gliding? It is a recreational activity and competitive air sport in which pilots fly unpowered aircraft known as gliders or sailplanes using naturally occurring currents of rising air in the atmosphere to remain airborne where did it start? Germany's Weimar Republic. how does it soar? By flying through air that is ascending as fast or faster than the glider itself is descending, thus gaining potential energy.
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Potential energy [SEP] Introduction
Potential energy is associated with forces that act on a body in a way that the total work done by these forces on the body depends only on the initial and final positions of the body in space. These forces, that are called "conservative forces", can be represented at every point in space by vectors expressed as gradients of a certain scalar function called "potential".