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Question

What is a free body diagram?


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Solution

  1. A free-body diagram is a graphic, dematerialized, symbolic representation of the body.
  2. In a free diagram, the size of the arrow denotes the magnitude of the force.
  3. While the direction of the arrow denotes the direction in which the force acts.
  4. A free body diagram consists of a simplified version of the body, coordinate system, etc.
  5. Free body diagrams are tools used to visualize force and moments applied to the body.
  6. Example A bottle is pushing horizontally on a tabletop.
  7. According to the diagram, the body is moving downward.
  8. The frictional force Ffriction is directed in the opposite direction of the motion (Fapp or applied force).
  9. The normal force(Fnorm) is directed normally to the plane of motion.
  10. Fgrav is the weight or force due to gravity.

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