6. What is Newton's first law? What is Newton's second law? What is Newton's third law?

7. What is the American system mass unit? How is weight related to mass?

8. What is a free body diagram?

9. What does it mean when the sum of all forces on a system added as vectors equals zero? Another way to consider it: If something isn't accelerating, what can you say about the forces acting on it? A non-accelerating system is one of two types of systems, the other being?

10. According to Newton's first law, if your car is moving, what is the force acting on it to prevent it from continuing in uniform motion?

11. Are objects in uniform straight line motion moving at a constant speed being accelerated? So the net force is?

12. What is the force called that opposes the force due to gravity? Why don't you sink into the ground due to your weight?

13. An 80 N traffic light sags 1m in the middle of a 30 m cable. Find the tensions.

14. A 20 N picture is hung by a string such that the string makes a 60 degree total angle coming up to and passing over the nail.Find the string tensions.

15. A stuck truck is tied to a tree by a cable that is then pulled on sideways (perpendicular) with a force of 200 lbs, making a 10 degree angle. What force is exerted on the truck?