Stationary.
Another word for momentum is "impetus." It refers to the force or energy of a moving object or idea.
Velocity.
The force with which one moving object hits another object is the force of impact or collision force. This force is determined by the speed and mass of the moving object, and it can cause the objects to change direction or deform upon impact.
Collided Into would be with a stationary object while "with" would be with another moving object.
When an object's distance from another object is changing, it is in motion. The change in distance indicates that the object is moving relative to the other object.
Satellite
Some other words for still or unmoving:immobilemotionlessstationary
Another word for momentum is "impetus." It refers to the force or energy of a moving object or idea.
the force or other moving object
Change of position relative to another object
The object does not appear to be staying in one place. Or, it is moving if it's distance from another object is changing.
a "body" "moving body" an "object" is moving with constant velocity. [OR] a "body" is moving with constant velocity.
orbiting
Velocity.
The one word that means "orbit" is "revolve." It refers to the action of an object moving around another object in a circular or elliptical path, typically due to gravitational attraction.
The force with which one moving object hits another object is the force of impact or collision force. This force is determined by the speed and mass of the moving object, and it can cause the objects to change direction or deform upon impact.
revolution is an object moving in a pattern around another object.