Across
- 2. any object that orbits around another object in space
- 3. states that the force of gravity acts between all objects in the universe that have mass
- 6. one of the two factors that affect the force of friction
- 7. states that an object’s acceleration depends on its mass and on the net force acting on it
- 10. the amount of matter in an object
- 12. another name for the Newton’s first law of motion
- 13. a unit of measurement that equals the force required to accelerate 1 kilogram of mass at 1 meter per second per second
- 15. type of surface that produces more friction
- 16. the force that two surfaces exert on each other when they rub against each other
- 18. friction that occurs when one solid surface slides over another
- 21. the rate at which velocity changes
- 22. friction that acts between objects that are not moving
- 23. friction that occurs as an object moves through a fluid
- 24. friction that occurs when an object rolls over a surface
- 26. type of surface that produces less friction
- 27. the SI unit of mass
- 28. a push or pull exerted on an object
- 29. states that an object at rest will remain at rest unless acted upon a nonzero net force & an object moving at a constant velocity will continue moving at a constant velocity unless acted upon by a nonzero net force
- 31. the product of an object’s mass and velocity
- 32. states that if one object exerts a force on another object, then the second object exerts a force of equal strength in the opposite direction on the first object
Down
- 1. an English physicist and mathematician famous for his laws of physics
- 4. the tendency of an object to resist a change in motion
- 5. one of the two factors that affect the force of friction
- 8. friction acts in the direction _________ to the direction of the object’s motion
- 9. the rule that in the absence of outside forces the total momentum of objects that interact does not change
- 11. a force that causes an object to move in a circle
- 14. the overall force on an object when all the individual forces acting on it are added together
- 17. the attractive force between objects; the force that moves objects downhill
- 19. the motion of a falling object when the only force acting on it is gravity
- 20. one of the two factors that affect the gravitational attraction between objects
- 25. one of the two factors that affect the gravitational attraction between objects
- 30. a measure of the force of gravity on an object