Physics Crossword Puzzle

2. Force that opposes motion between two surfaces. Caused by imperfections that catch on each other as objects rub past.
4. Force of gravity that acts on an object's mass
9. The longest side of a right triangle
11. Type of friction between a surface and an object moving relative to that surface
15. A quantity with only magnitude
16. Standard unit for force
17. Rate of change in velocity
19. Type of friction that increases with applied force
20. The amount of matter in an object

1. A push or pull one object exerts on another object
3. Standard unit for length
5. Newton's Law that states that every action has an equal and opposite reaction
6. Newton's Law that states that a non zero net force causes an object to accelerate
7. Taking this trig function of an angle is equal to adjacent over hypotenuse
8. Speed with direction
10. Force that a surface exerts on an object that it supports
12. Standard unit for mass
13. A quantity with both magnitude and direction
14. An object's tendency to resist change to its status
15. Taking this trig function of an angle is equal to opposite over hypotenuse
18. Newton's Law of motion that states an object at rest will remain at rest and an object in motion will remain in motion if the net force is zero
19. Rate of change of distance