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Forces and Free Body Diagrams

Forces and Free Body Diagrams. 11/6/13. Bellwork. What book did Newton write in 1687? The Principia (Mathematical Principles of Natural Philosophy). Force and Free Body Diagrams.

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Forces and Free Body Diagrams

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  1. Forces and Free Body Diagrams 11/6/13

  2. Bellwork • What book did Newton write in 1687? • The Principia (Mathematical Principles of Natural Philosophy)

  3. Force and Free Body Diagrams • Free-body diagrams (F.B.D.): Diagrams that show the relative magnitude and direction of all forces acting upon an object in a given situation.

  4. Contact Forces Applied Force Surface Force Friction Force Air Resistance Force Tension Force Compression Force Spring Force Lift Force Thrust Force Action-at-a-Distance Forces Force of Gravity Electrical Force Magnetic Force

  5. Types of Forces

  6. Types of Forces

  7. Types of Forces

  8. Types of Forces

  9. Free Body Diagrams • The direction of the arrow shows the direction that the force is acting. • The size of the arrow in a free-body diagram reflects the magnitude of the force. • Each force is labeled to indicate the exact type of force. • Represent the object by a box (or drawing) and draw the force arrows from the center of the box outward in the direction that the force is acting. • Can be any number of forces

  10. Forces on a Wing

  11. Free Body Diagram of a Wing

  12. Examples of F.B.D. • Ex 1) Mr. Z. standing on the ground. • Ex 2) As Mr. Z. is throwing a tennis ball across the room to the left. • Ex 3) The tennis ball as it moves through the air after Mr. Z. has thrown it.

  13. Free Body Diagram Activities 11/6/13

  14. Free Body Diagrams • “Free Body Diagram Activities” – Due tomorrow Thurs. 11/7/13 • “Free Body Diagram Practice” – Due Friday 11/8/13

  15. Free Body Diagram Activities 1) Sliding a book across the table to the right. A) Before you slide the book. B) Sliding the book as it accelerates C) Sliding the book with constant velocity. 2) Lightly kicking a tennis ball across the floor to the right. A) As you are kicking the ball. B) As the ball is rolling across the floor after the kick. C) When the ball comes to a complete stop. 3) Throwing a tennis ball straight up into the air. A) As you are throwing the ball in your hand. B) When the ball is going up. C) When the ball is coming down. D) When you catch the ball. 4) Throwing a paper airplaneto the right. A) When you are throwing the paper airplane. B) When the paper airplane is in the air. C) As the paper airplane hits the ground. 5) The foot of a person walking to the right then stopping. A) Before the person starts walking. B) As the person is walking. C) As the person stops.

  16. Free Body Diagrams

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