Forces and Motion

2. the force that causes a 1kg mass to accelerate at a rate of 1 meter per second each second
6. force that acts between any two masses
7. force of gravity acting on an object
8. force that opposes the direction of motion of an object as it slides over a surface
10. the product of an object's mass and its velocity
11. a measure of the inertia of an object and depends on the amount of the matter the object contains
14. no net force acts on a system, then the total momentum of the system does not change
16. a center-directed force that continuously changes the direction of an object to make it move around the center
17. constant velocity of a falling object when the force of air resistance equals the force of gravity
20. friction force that acts on objects that are not moving
21. opposes the motion of an object through fluid
22. attractive force that acts only over a short range

1. the motion of a falling object after it is given an initial forward velocity
3. the tendency of an object to resist a change in its motion
4. associated with charged particles
5. powerful force of attraction that acts only on the neutrons and protons in the nucleus, holding them together
9. an attractive force that acts between any two masses
12. the fiction force that acts on rolling objects
13. the overall force acting on an object after all the forces are combined
15. a force that opposes the motion of objects that touch as they pass one another
18. fluid friction acting on an object moving through the air
19. a push or pull that acts on an object