Define free-body diagram.

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SSC JE ME Previous Paper 11 (Held on:22nd March 2021 Morning)
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  1. A figure that represents external forces acting on a body.
  2. A diagram that represents internal forces acting on a body.
  3. A free-hand sketch representing a body.
  4. A diagram that only represents moments acting on a body.

Answer (Detailed Solution Below)

Option 1 : A figure that represents external forces acting on a body.
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Detailed Solution

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Explanation:

Free-Body Diagram: These are the diagrams used to show the relative magnitude and direction of all external forces acting upon an object in a given situation. A free-body diagram is a special example of vector diagram.

Some common rules for making a free-body diagram:

  • The size of the arrow in a free-body diagram reflects the magnitude of the force.
  • The direction of the arrow shows the direction that the force is acting.
  • Each force arrow in the diagram is labeled to indicate the exact type of force.
  • It is generally customary in a free-body diagram to represent the object by a box and to draw the force arrow from the center of the box outward in the direction that the force is acting.

Example:

F1 J.S 18.5.20 Pallavi D1 

F1 J.S 18.5.20 Pallavi D2

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