Orbital and Sub Orbital Flight

A body in orbit is in a state of free fall i.e., the body freely moves under the influence of Gravitational field,A body when provided with an orbital velocity (Vo) tends to move along a straight line in the direction of the velocity, however ,the attractive force from the gravitational field of the planet tends to pull it towards the center. The body therefore falls towards of the planet. As the body falls,the orbit velocity Vo pushes it further away from the planet and the body always misses falling on the planet.As long as the velocity provided to a body is less than the escape velocity of gravitational attraction of the given planet will cause the body to fall towards it. when the body goes into orbit , the motion corresponds to a state of free fall.If the velocity provided is less than the orbital velocity , the body falls on the planet corresponding to a sub-orbital flight.
The motion of different planets in the solar system about the sun is also in a state of free fall.