Across
- 2. According to the law of universal ______, if no net force acts on a system, the total momentum of the system does not change.
- 3. The universal force that is most effective over the longest distance is ____.
- 5. The gravitational force between two objects increases as distance _____ .
- 6. When opposite poles of two magnets are brought together, they ____ each other.
- 10. The gravitational force between two objects _____ as mass increases.
- 11. the centripetal force acting on a satellite in orbit acts as an ______ force on the satellite.
Down
- 1. When an object is sliding, the sliding friction force acts in a direction ______ of motion.
- 4. When a pair of balanced forces acts on an object, the net force that results is equal to _____.
- 5. The centripetal force acting on a satellite in orbit changes the _____ of the satellite.
- 7. The acceleration due to gravity is about one-third the acceleration due to gravity on Earth's surface, so objects on Mars have a weight that is one-______ the weight on Earth's surface.
- 8. The _____ acting on a satellite in orbit is a center-directed force.
- 9. Motion caused by the downward force of gravity and an initial forward velocity is _____ motion.