Forces puzzle

2. body's relative mass or the quantity of matter contained by it, giving rise to a downward force; the heaviness of a person or thing
7. quickness of motion
8. those that are equal in magnitude but opposite in direction.
9. A force on objects or substances in contact with each other that resists motion of the objects or substances relative to each other.
12. the action or process of moving or of changing place or position; movement.
13. rate at which velocity changes with time, in terms of both speed and direction.
14. force necessary to provide a mass of one kilogram with an acceleration of one metre per second per second.
15. the gravitational attraction of the mass of a heavenly body (as the earth) for bodies at or near its surface
17. e tendency of objects in motion to stay in motion and objects at rest to stay at rest, unless a force causes its speed or direction to change

1. a quantity or phenomenon that has two independent properties: magnitude and direction
3. forces that are not equal in magnitude and may or may not act in the same direction.
4. a unit of mass equal to 1,000 grams
5. the sum of all forces acting on an object in a single plane
6. strength or energy as an attribute of physical action or movement.
10. the property of a body that is a measure of its inertia and that is commonly taken as a measure of the amount of material it contains and causes it to have weight in a gravitational field
11. when a book is placed on a table, the normal force keeps the book from falling through the table.
16. a quantity or phenomenon that has two independent properties: magnitude and direction