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# Foundation Science Presentation 4

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Newton's 3 laws of motion are discussed

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### Foundation Science Presentation 4

1. 1. I will collect notebooks today!!I will grade your notes and the questions you answered in class. Tryto finish them if you have time
2. 2. Review of ForcesDraw a balanced force in your notebooks using vectors
3. 3. Review of ForcesDraw a vector of a balanced force in your notebooks N 5 N east 5 N west Net force = 0 No movement
4. 4. Review of ForcesDraw a vector of a balanced force in your notebooks N 5 N east 5 N west Net force = 0 No movementDraw an unbalanced force using vectors in your notebooks, show thedirection of the movement (there must be movement in anunbalanced force)
5. 5. Review of ForcesDraw a vector of a balanced force in your notebooks N 5 N east 5 N west Net force = 0 No movementDraw a vector of an unbalanced force in your notebooks, show thedirection of the movement (there must be movement in anunbalanced force) N 5 N east 3 N west Net force = 2 N east
6. 6. Newton’s First Law (law of inertia) What is Newton’s 1st law?? • Objects in motion stay in motion unless a force is applied to them • Objects at rest stay at rest unless a force is applied to them What is inertia?? • Tendency of an object to resist change in its state of motion Newton’s Second Law……….
7. 7. Newton’s Second LawForce is equal to an object’s mass times its acceleration  f ma N = kg x m/s2 N/kg = m/s2 m/s2 = acceleration
8. 8. Newton’s Third LawAll forces exist in pairsFor every action, there is an equal and opposite reactionTHERE CANNOT BE ONE FORCE
9. 9. Complete Questions in Notebook1. Using the equation to the right, what will be  more difficult to accelerate, an object with a f ma large or a small mass?2. Explain Newton’s first, second and third laws and draw a picture to help explain each law.