Force

6. The tendency of an object to resist any change in its motion
9. the force that pulls objects toward each other
10. Force A push or pull on one object by another that is touching it
12. the amount of matter in an object
14. Force forces that produce a nonzero net force, which changes an object's motion
15. When the net force of an object is zero
16. (SI Unit) A unit of measurement that equals the force required to accelerate 1 kilogram of mass at 1 meter per second, per second
18. Force The upward force that is applied to objects when they exert a force on a surface

1. the force that one surface exerts on another when the two surfaces rub against each other
2. Force A force that one object can apply to another without physically touching
3. the force of gravity on an object at the surface of the planet
4. Force equal forces acting on an object in opposite directions
5. Force the overall force on an object when all the individual forces acting on it are added together
7. Velocity The maximum speed an object will reach when free-falling through a substance, such as air
8. Resistance Friction acting upon an object moving through the air
11. Force A force exerted toward the center of a curved path
13. Fall the motion of a falling object when the only force acting on it is gravity
17. a push or pull exerted on an object