Across
- 3. the act of working out the former of something
- 6. the highest altitude a rocket reaches during flight
- 7. propel with force
- 8. the rate of change of position along a straight line with respect to time
- 11. The part of the plane that provides stability for the plane
- 13. the top of the rocket
- 14. A part of the engine
- 15. The flaps slide back and down to increase the surface of the wing area.
- 17. the wings of a plane.
- 18. something that adds weight in order to improve stability
- 20. any substance that moves forward
- 21. an assemblage of separate parts
- 23. a composite of mixed origin
- 24. is the exhaust duct of the engine.
Down
- 1. is the vertical part of the tail
- 2. Also called airfoils;provide the lift for the plane
- 4. a force that pushes objects come down to the earth.
- 5. The body of the plane
- 9. the point on the rocket where all mass appears to be concentrated
- 10. a force that pushes objects upward.
- 12. force that acts between the object and the fluid and slows the motion of the object
- 13. the air is mixed with fuel and then ignited.
- 16. a force causing to move forward
- 19. machine that creates mechanical energy and so parts motion
- 22. smooth,even airflow around the rocket