Water Rocket Terms

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Across
  1. 1. the force that acts to resist the relative motion (or attempted motion) of objects or materials that are in contact
  2. 5. how fast something is moving
  3. 7. a measure of an object's inertia; also a measure of the amount of matter in an object
  4. 8. the spinning motion that takes place when an object rotates about an axis located within the object (usually an axis through its center of mass)
  5. 9. one of the pair of forces described in newton's third law
  6. 11. property of any body to resist changes in its state of motion
  7. 14. energy of motion, equal to half the mass multiplied by the speed squared
  8. 17. motion under the influence of the gravitational force only
  9. 19. any object that moves through the air or through space, acted on only by gravity (and air resistance, if any)
  10. 20. speed together with the direction of motion
  11. 21. SI unit of force
  12. 22. the fundamental SI unit of mass
Down
  1. 2. the point at the center of an object's weight distribution, where the force of gravity can be considered to act.
  2. 3. friction, or drag, that acts on something moving through air
  3. 4. Force per unit of surface area where the force is perpendicular to the surface; measured in pascals
  4. 6. anything that flows; in particular, any liquid or gas
  5. 10. terminal speed together with the direction of motion (down for falling objects)
  6. 12. the force that is equal in strength and opposite in direction to the action force, which acts simultaneously on whatever is exerting the action force
  7. 13. any influence that tends to accelerate an object; a push or pull; measured in newtons
  8. 15. the point at the center of an object's mass distribution, where all its mass can be considered to be concentrated. For everyday conditions, it is the same as the center of gravity
  9. 16. the force on a body due to the gravitational attraction of another body (commonly Earth)
  10. 18. a general hypothesis or statement about the relationship of natural quantities that has been tested over and over again and has not been contradicted.