Term 
Definition 
Instantaneous 
the speed of an object at one instant of time 
Instantaneous 
the speed of an object at one instant of time 
Average speed 
equals the total distance traveled divided by the total time taken to travel the distance 
Average speed 
equals the total distance traveled divided by the total time taken to travel the distance 
Mass 
amount of matter in an object 
Mass 
amount of matter in an object 
Inertia 
tendency of an object to resist a change in as motion 
law of conservation of momentum 
states that the total momentum of objects that collide with each other is the same before and after the collision 
center of mass 
point in an object that moves as if all of the objects mass were concentrated at that point 
weight 
gravitational force between an object and earth 
force 
a push or a pull 
net force 
combination of all forces acting on an object 
displacement 
the moving of something from its place or position. 



