Force

2. A unit of measurement that equals the force required to accelerate 1 kilogram of mass at 1 meter per second, per second
3. When the net force of an object is zero
8. The tendency of an object to resist any change in its motion
9. A force that one object can apply to another without physically touching
11. the amount of matter in an object
13. the force that pulls objects toward each other
15. A force exerted toward the center of a curved path
16. equal forces acting on an object in opposite directions
18. The maximum speed an object will reach when free-falling through a substance, such as air

1. forces that produce a nonzero net force, which changes an object's motion
4. the force that one surface exerts on another when the two surfaces rub against each other
5. Friction acting upon an object moving through the air
6. the force of gravity on an object at the surface of the planet
7. The upward force that is applied to objects when they exert a force on a surface
10. A push or pull on one object by another that is touching it
12. the motion of a falling object when the only force acting on it is gravity
14. a push or pull exerted on an object
17. the overall force on an object when all the individual forces acting on it are added together