VOCABULARY acceleration change in speed during a certain period of time ascent going up descent going down force that which, when acting alone on an object, causes a change in the motion of the object gravity force on Earth which pulls all objects toward its center orbit falling around and around Earth resistance a force opposing the motion of an object or opposing the forces trying to set an object in 
(descent going down force; causes; a change in the motion of the object gravity force on Earth; T:when acting alone on an object) (a force opposing the motion of an object or opposing the forces; trying; to set an object) Context(a force opposing the motion of an object or opposing the forces trying,List([315, 385))):(a force; opposing; the motion of an object) Context(a force opposing the motion of an object or opposing the forces trying,List([315, 385))):(a force; opposing; the forces) Context(a force opposing the motion of an object or opposing the forces trying,List([315, 385))):(a force opposing the motion of an object or opposing the forces; trying to set; an object) (the object gravity force on Earth; pulls; all objects toward its center orbit)
a force opposing the motion of an object or opposing the forces trying,List([315, 385)) a force opposing the motion of an object or opposing the forces trying,List([315, 385)) a force opposing the motion of an object or opposing the forces trying,List([315, 385))
descent going down force a force opposing the motion of an object or opposing the forces a force a force a force opposing the motion of an object or opposing the forces the object gravity force on Earth
causes trying opposing opposing trying to set pulls
a change in the motion of the object gravity force on Earth T:when acting alone on an object
to set an object
the motion of an object
the forces
an object
all objects toward its center orbit