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Presentation transcript:

Today in your notebooks Left side items Right side items Simple machines Introduction to forces Newton’s laws chart Newton’s laws Unbalanced forces brainpop Unbalanced forces simulation In Question w.o. 12.3.12 BLANK Net force diagrams Net force notes

Plans until the end of the year 5. Hoover Dam Video 6. Hydroelectric power 7. Field trip 8. Quiz- circuits 9. No School 12. No School 13. Reteach- PK energy, transformations 14. Electricity lab 15. Electricity lab 16. Electricity lab 19. FR test 20. MC test 21. Thanksgiving 22. Thanksgiving 23. Thanksgiving 26. Begin force and motion 27. Newton’s laws 28. Balanced vs. unbalanced 29. Balanced vs. unbalanced 30. quiz 3. Net force 4. Net force 5. Friction (SUB) 6. Friction 7. Friction (SUB) 10. Inertia 11. Magnetism 12. Quiz 13. Exam review 14. Exam review 17. Exam Week 18. Exam Week 19. Exam Week 20. Exam Week 21. Exam Week

NET FORCE (Right) W. is a net force? How do we calculate net force? 3) What is the result of net force? The combination of all forces acting on an object 2) When forces act in opposite directions- subtract the forces. The net force always acts in the direction of the stronger force. When the forces are the same there is no net force. 3) Net force causes movement

Net force diagrams Ex 1) What direction does the object move? Left- right: 100 N cancel out 150N – 50N = 100N arrow pushing up

Net force diagrams Ex 2) What would be necessary to balance the forces? Left-right: Add 50N to the arrow pushing right or subtract 50N from the left Up-down: Add 25N up or subtract 25N down