| A | B |
|---|
| Force | A push or pull by an agent upon a receiver. |
| Unbalanced Force | Causes changes in motion or shape.q |
| Balanced Force | Objects are at rest or unchanging. |
| Pressure | The fraction of the force applied to each square of the receiver. |
| Weight | The amount that gravity pulls on an object. |
| Mass | The amount of matter in an object. |
| Atmospheric Pressure | The fraction of the force of air, pushing on each square of everything on earth. |
| Pascal's Law | Fluids push in all directions. |
| Water pressure | The fraction of the force of water pushing on each square of objects in and around it. |
| Buoyancy | The upward push upon all objects in water, floating or sinking. |
| Archimedes Principle | An object in water will lose the amount of weight that it can push aside. |
| Pounds | A unit of measure for force and weight in U.S. |
| Newton | A unit of measure for force and weight in S.I. |
| Gram | A unit of measure for mass in S.I. |
| One gram in one milliliter | The density of cold water. |
| Displace | To push aside and take its place. |
| Floating or a book on a table. | Examples of balanced forces. |
| Sinking or a falling book. | Examples of unbalanced forces. |
| Blood pressure | The fraction of the force of blood on each square of vessel walls. |
