Salma Lahbibi rocket science

123456789101112131415
Across
  1. 3. a thing that plays a central or essential role in an activity, event, or situation
  2. 7. the principal or horizontal axis of a system of coordinates
  3. 9. machine any of the basic mechanical devices for applying a force
  4. 10. supposition or a system of ideas intended to explain something
  5. 11. variable variable whose variation does not depend on that of another
  6. 13. force an effort must overcome order to do work frictional forces of air against moving objects
  7. 15. strength or energy as an attribute of physical action or movement
Down
  1. 1. the secondary or vertical axis of a system of coordinates
  2. 2. force pushing an object direction are greater than the forces pushing it in the opposite direction
  3. 4. machine a machine consisting of two or more simple machines operating together
  4. 5. a supposition or proposed explanation made on the basis of limited evidence as a starting point for further investigation
  5. 6. imply a cause and effect between the observed elements and must always apply under the same conditions
  6. 8. variable variable whose variation does not depend on that of another
  7. 12. advantage the ratio of the force produced by a machine to the force applied to it
  8. 14. physical activity as a means of earning an income