Force & Motion

2. Gravitational force exerted on an object
6. States that if no external forces act on a group of objects, their total momentum does not change
7. A change in an object’s position relative to a reference point
8. Tendency of an object to resist any change in its motion
12. Force that opposes the motion of objects that move through the air
14. States that when one object exerts a force on a second object, the second object exerts a force on the first object that is equal in strength and in the opposite direction
16. Rate of change of velocity, can be calculated by dividing the change in the velocity by the time it takes the change to occur
18. Distance an object travels per unit of time
19. Force that opposes the sliding motion between two touching surfaces
20. States that the acceleration of an object is in the same direction as the net force on the object, and that the acceleration equals the net force divided by its mass

1. Describes the fall of an object on which only the force of gravity is acting
3. Attractive force between two objects that depends on the masses of the objects and the distance between them
4. A force that is directed toward the center of a curved or circular path
5. States that an object moving at a constant velocity keeps moving at that velocity unless an unbalanced force acts on it
9. A push or pull exerted on an object
10. Distance and direction of an object’s change in position from the starting point
11. Acceleration of an object toward the center of a curved or circular path
13. The speed and direction of a moving object
15. The maximum speed an object will reach when falling through a substance, such as air
17. The length an object travels, measured SI units of the meters