1. Chapter 2: Force & Newton’s Laws

2. What is a balanced force? Forces that are equal in size but opposite direction.

3. What would happen to a ball that was thrown horizontally if there was NO gravity? The ball would continue to travel horizontally.

4. How does air resistance change as you move faster? Air resistance increases.

5. What is static friction? Static friction is the force that you have to overcome in order to move an object.

6. What force always acts in an opposing direction of a moving object? Friction

7. What causes a feather to fall more slowly than a brick? Air resistance

8. What is inertia? The tendency of an object to resist any change in motion.

9. What is a force? A force is a push or pull that one object exerts on another.

10. What direction does friction travel in relationship to a moving object? Friction travels in an opposite direction of a moving object.

11. What causes a ball to experience vertical acceleration? Gravity

12. What happens to the acceleration of an object if you double the net force? The acceleration doubles.

13. Short Answer Give an example of rolling friction and sliding friction. Which would allow you to move an object more easily?

14. Short Answer Give an example of you moving an object and have to overcome static friction and then how sliding friction comes into effect.

15. Newton’s Three Laws Describe each law. Where do we see each law? What forces are present in each law?

16. Labs Go over each of our labs and make a connection from that lab to the concept we were learning in class.

17. Calculations What is the force? m = 15 kg a = 3 m/s 2 Answer: 45 N

18. Calculations What is the mass? F = 2000 N a = 40 m/s 2 Answer: 50 kg

19. Calculations What is the acceleration? F = 150 N m = 25 kg Answer: 6 m/s 2