Chapter two vocab.

3. A force that one object can apply to another object without touching it.
6. The tendency of an object to resist a change in its motion is called inertia.
8. A push or pull object is called a...
11. s an attractive force that exists between all objects that have mass.
12. If the net force on an object is zero, the motion of the object does not change.
14. In a circular motion, a force that acts perpendicular to the direction of motion toward the center of the curve.
15. Is the gravitational force exerted on an object.
16. Is a measure of how hard it is to stop a moving object.
17. The total momentum of a group of objects stays the same unless outside forces act upon the object.

1. The combination of all the forces acting on an object is the net force.
2. When one object exerts a force on a second object the second object exerts an equal force in the opposite direction on the first object.
4. The forces two objects apply to each other.
5. Is a push or a pull on one object by another that is touching it.
7. Is a force that resists the motion of two surfaces that are touching.
9. The acceleration of an object is equal to the net force acting on the object divided by the object’s mass.
10. Forces acting on an object that combine and form a net force of zero are balanced forces.
13. Is any motion in which an object is moving along a curved path.
16. Is the amount of matter in an object.