Physics

4. When an object moves in a straight line at a constant speed
5. net force equals mass times acceleration
7. When the net force on the object is zero, the object is in mechanical equilibirum
11. A variable that does not depend on another
13. The digits in a number that are known with certainty, plus one estimated digit
15. For every action force, there is an equal and opposite reaction force
16. a measure of how dispersed the data is in the relation to the mean
17. Unit of mass
19. When the forward and reverse processes occur at the same rate, resulting in no observable change in the system
21. Reveals how accurately the sample data represents the whole population

1. Used to predict unknown aspects of an object's motion if other aspects are known
2. A variable that does not depend on another
3. A force exerted by a string, cable, or similar object
6. A variable that depends on another
8. The law of inertia
9. The digits in a number that are known with certainty, plus one estimated digit
10. Occurs when an object is launched horizontally and is then only affected by gravity
12. When the net force on the object is zero, the object is in mechanical equilibirum
14. An unbalanced force is needed to change an object's ....
18. Occurs when an object or a system remains at rest and does not tilt or rotate
20. Creator of the three laws of motion