# Physics

##### Across
1. 1. Change in velocity divided by time interval over which it occurred.
2. 3. The force that opposes the motion between two surfaces that are in contact.
3. 4. The manipulated variable.
4. 6. The acceleration of a body is directly proportional to the net force on it and inversely proportional to its mass.
5. 9. Forces that give materials their strength.
6. 13. An object with no force acting on it moves with constant velocity.
7. 16. Gravitational force exerted by a large body, usually Earth.
8. 17. Quantity,like distance,that has only a magnitude, or size.
9. 18. Ratio of change in position to time interval over which change takes place.
10. 19. Change in position.
11. 20. Responding variable.
##### Down
1. 2. A constant that depends on the surfaces in contact.
2. 5. Quantity having both magnitude and direction.
3. 7. Friction Force that opposes the start of motion.
4. 8. The separation between two points.
5. 10. Acceleration measured over a finite time interval.
6. 11. When one object exerts a force on a second object, the second exerts a force on the first that is equal in magnitude but opposite in direction.
7. 12. Study of matter and energy and their relationships.
8. 14. Velocity measured over a finite time interval.
9. 15. The magnitude of the velocity.