Across
- 2. action of pulling something forcefully.
- 4. Robert H. Goddard Physical engineer.
- 6. von Braun Aerospace engineer.
- 7. to push something with foce.
- 9. chemical substance used in production of energy.
- 11. speed of something in a given direction.
- 13. third law of motion Every action there is an equal reaction.
- 14. to push something or someone.
Down
- 1. not turbulent.
- 3. of pressure equal pressure
- 5. projectile that can be propelled into space.
- 8. moving unsteadily.
- 10. takeoff
- 12. impulse product of thrust times duration.