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Free Body Diagrams

Free Body Diagrams. A Free Body Diagram (FBD) is a visual representation of all the forces acting on a single object. FBDs are extremely powerful problem solving tools that bridge the gap between qualitative analysis and a quantitative mathematical representation. Drawing an FBD….

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Free Body Diagrams

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  1. Free Body Diagrams A Free Body Diagram (FBD) is a visual representation of all the forces acting on a single object FBDs are extremely powerful problem solving tools that bridge the gap between qualitative analysis and a quantitative mathematical representation

  2. Drawing an FBD… • A simple dot can beusedtorepresenttheobject in question • Identifytheforcesacting ON thatobjectonly • Drawonearrowtorepresenteachforceacting ON theobject • Allarrowsshouldbedrawnfromthedotorthe center of theobject • Thearrowspoint in thedirection of theforce. • Thelength of thearrowrepresentstherelativemagnitude of theforce…ielongerarrows = largerforce

  3. Normal Force Weight/Force due to Gravity Example 1 A labcartrestingon a worktop

  4. Normal Force AppliedForce friction Weight Example 2 A labcartmovingwith a constantvelocityacross a surface

  5. Normal Force AppliedForce friction Weight Example 3 A labcartacceleratingacross a surface

  6. Tension Weight Example 3 A tetherballwhileswinging at a constantspeedaround a pole

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