Across
- 2. the mass of an object
- 6. measured by Henry Cavendish
- 8. a quantity that has only magnitude but no direction
- 9. pulls only one moon
Down
- 1. pulls more than 60 moons
- 3. a scientist that introduced the law of universal gravitation
- 4. instrument used by Cavendish to measure attraction
- 5. a push or pull that can change the motion of the object
- 6. a very weak force
- 7. a quantity that has a magnitude and direction