"Unit 3 - Force and Motion": HTML5 Crossword

Across

2. Tendency of an object to resist changes in motion (7)
5. a friction force that opposes the motion of an object as it slides over a surface (7,0)
7. The rate of change in velocity (12)
9. the friction that occurs when a solid object moves through a fluid (5,0)
13. Speed in a given direction (8)
14. Units of Force (6)
16. type of force that results when 1 force is stronger or weaker than the other (10)
19. Objects at rest stay at rest, objects in motion stay in motion unless acted on by an unbalanced force (5,3)
20. Attractive force between two objects that depends on the masses of the objects and the distance between them. (7)

Down

1. type of force that results when both of the forces against each other are equal (8)
3. A unit of measure of Force (6)
4. friction that occurs when an object rolls over a surface (7,8)
6. A push or pull exerted on an object (5)
8. The force that two surfaces exert on each other when they rub against each other (8)
10. Acceleration is directly proportional to the force and inversely proportional to the mass of the object. (6,3)
11. Units of Distance (6)
12. Units of Time (7)
15. The sum of all the forces acting on an object (3,5)
17. Units of Mass (8)
18. a friction force that acts on objects that are not moving (6,0)