Vocabulary

2. - the attraction between any two objects because of their masses
5. - the product of an object’s mass and its velocity
7. - a push or a pull that acts on an object
8. Friction - a frictional force that acts on rolling objects, caused by the change in shape at the point of rolling contact
9. Friction - a friction force that acts on objects that are not moving
10. - the force of gravity acting on an object
11. Friction - a friction force that opposes the motion of an object through a fluid
13. Force - the overall force acting on an object after all the forces are combined
15. - the SI unit for force
16. Motion - the curved path of an object in free fall after it is given an initial forward velocity

1. Friction - a friction force that opposes the motion of an object as it slides over a surface
3. Resistance - fluid friction acting on an object moving through the air
4. - the tendency of an object to resist a change in its motion
6. - the amount of matter in an object; a measure of the inertia of an object, which depends on the amount of matter the object contains
7. - a force that opposes the motion of objects that touch as they move past each other
12. of Conservation of Momentum - law stating that the total momentum of a system does not change if no net force acts on the system
14. Velocity - the constant velocity of a falling object when the force of air resistance equals the force of gravity