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Free body diagrams

Free body diagrams. Newtonian forces. Free body diagrams. What is a free body diagram? A free body diagram is a representation of all the forces acting on an object. Physicsclassroom.com. Free body diagrams. How do you approach a free body diagram? 1. read the question carefully

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Free body diagrams

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  1. Free body diagrams Newtonian forces

  2. Free body diagrams • What is a free body diagram? • A free body diagram is a representation of all the forces acting on an object. Physicsclassroom.com

  3. Free body diagrams • How do you approach a free body diagram? • 1. read the question carefully • 2. decide which forces are acting on the object • 3. determine size and direction of forces • 4. draw a box and place forces on the box where they belong • 5. use forces to answer any questions in the problem

  4. Free body diagrams • A car is sitting on a road with a weight of 22000 Newtons and a forward force of 5600 Newtons with a force of friction of 340 Newtons. What is the total force acting on this object? 5600 N 340 N What’s missing? 22000 N

  5. Free body diagrams • What is a normal force? • Normal force is the force perpendicular to the surface an object is sitting on if it is supported. 22000 N 5600 N 340 N 22000 N

  6. Free body diagrams • What happens if the object is not on a flat surface? • If an object is not on a flat surface, the angle of incline becomes part of a vector problem. • Example: a 22000 N car is sitting on a 30.0° incline. Will the normal force be 22000 N? 19000 N 22000 N

  7. Free body diagrams • What is friction? • Friction is 2 surfaces rubbing together. • Friction is the force that opposes all motion. • Friction stops this object from sliding down the hill. 19000 N 11000 N 22000 N

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