Force

3. A unit of measurement that equals the force required to accelerate 1 kilogram of mass at 1 meter per second, per second
9. the force of gravity on an object at the surface of the planet
11. Friction acting upon an object moving through the air
13. a push or pull exerted on an object
14. A force exerted toward the center of a curved path
15. A force that one object can apply to another without physically touching
17. the motion of a falling object when the only force acting on it is gravity
18. When the net force of an object is zero

1. the force that pulls objects toward each other
2. forces that produce a nonzero net force, which changes an object's motion
4. A push or pull on one object by another that is touching it
5. the amount of matter in an object
6. The upward force that is applied to objects when they exert a force on a surface
7. the overall force on an object when all the individual forces acting on it are added together
8. equal forces acting on an object in opposite directions
10. The maximum speed an object will reach when free-falling through a substance, such as air
12. The tendency of an object to resist any change in its motion
16. the force that one surface exerts on another when the two surfaces rub against each other