Across
- 2. most massive planet in the solar system
- 6. another name for movement energy
- 8. total unbalanced force when two or more forces are acting on an object
- 10. when an object is at rest or moving at a constant speed the forces acting on it are...
- 13. a contact force when two surfaces are rough
- 14. object in orbit around a planet or star
- 15. closest planet to the Sun
- 17. a satellite at a height of 36000 km
- 19. amount of matter in an object or person
Down
- 1. force pulling objects towards the Earth's centre
- 3. device to measure time, speed or acceleration how quickly the speed of an object is changing
- 4. distance travelled by light in one year
- 5. this is created by the air friction with the fast moving space craft upon re-entry
- 7. shape of reflectors used in satellite communications
- 9. force acting on object or person due to gravity
- 11. another word for water resistance
- 12. unit of force
- 16. Telecommunications, military observations and weather monitoring are examples of satellite ...
- 18. equals distance travelled per unit time