Force, Energy, & Gravitational Force

6. force the sum of all forces acting on an object
7. the force exerted on the mass of a body by a gravitational field
9. speed is the rate position changes, distance traveled/time taken
11. speed speed of an object at a particular moment (instant) in time
13. of conservation of momentum "for two objects colliding in an isolated system, the total momentum before and after the collision is equal"
14. the distance traveled per unit of time
15. a property of matter by which it continues in its existing state of rest or uniform motion in a straight line, unless that state is changed by an external force
17. the quantity of motion of a moving body, measured as a product of its mass and velocity
18. a measure of how fast something moves in a particular direction

1. the rate of change of velocity per unit of time
2. can cause an object with mass to change its velocity
3. force a force that attracts any objects with mass
4. the resistance that one surface or object encounters when moving over another
5. third law of motion "for every action, there is an equal and opposite reaction"
8. forces two forces acting in opposite directions on an object, and equal in size
10. the quantity of matter which a body contains
12. forces forces that cause a change in the motion of an object
16. of mass two forces acting in opposite directions on an object, and equal in size