Across
- 2. has such a large gravitational field that it pulls more than 60 moons in orbit
- 5. A force that causes objects with mass to attract one another
- 6. the heaviness of an object
- 7. introduced the law of universal gravitation
- 9. all force fields (magnetic, electric, and gravitational) are also called this
Down
- 1. gravitational constant was measured by him 71 years after Newton's death
- 3. the frictional force air exerts against a moving object
- 4. a small planet that only pulls one moon in orbit
- 8. ___ is a vector because it has both a size and direction
- 10. length, area, volume, speed, mass, density, pressure