Free body diagram Definition and 256 Threads

A free body diagram consists of a diagrammatic representation of a single body or a subsystem of bodies isolated from its surroundings showing all the forces acting on it.
In physics and engineering, a free body diagram (force diagram, or FBD) is a graphical illustration used to visualize the applied forces, moments, and resulting reactions on a body in a given condition. They depict a body or connected bodies with all the applied forces and moments, and reactions, which act on the body(ies). The body may consist of multiple internal members (such as a truss), or be a compact body (such as a beam). A series of free bodies and other diagrams may be necessary to solve complex problems.

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  1. P

    Free body diagram Homework Problem

    Can someone please help with this problem. I'm lost! 1. A 150 kg bear walks out onto a beam as illustrated in Fig P8.20 trying to get to a picnic basket with mass 10kg. The beam is 6m long and has mass 40kg (you can consider its weight to be concentrated at a point 3m from the wall. (a)...
  2. J

    What is the Free Body Diagram for a Chain with Four Links?

    hello. I need help drawing free body diagram for four links on a chain. The picture looks like this: | <-thats a rope 8 <-these are links; they should all be connected 8 heres a good picture of a chain: http://homepage.mac.com/kpreid/povray/chain.png the first link is connected...
  3. P

    Simple Free Body Diagram question

    I have a question in my textbook that I can't answer for the life of me. "A 6500-kg helicopter accelerates upward at .6 m/s^2 while lifting a 1200-kg car. (a) what is the lift force exerted by the air on the rotors?" Now, my diagram has a vector pointing up with a force of (6500*9.8)N...
  4. F

    Free body diagram for the block showing all the forces

    A block is held in place on a frictionless incline by a massless string. The string is horizontal. I have to sketch a free body diagram for the block showing all the forces exerted on the block.
  5. C

    Dynamics Problem HELP - Free body diagram

    IM in Phys.20 Got this question for an assignment. Tried it and got stuck. I really need help -------- When golfing, uphill and downhill putts present different levels of difficulty. Suppose a green has a 5.0 degree slope and the force of friction will be 0.10N...
  6. M

    Is my Free Body Diagram right?

    Howdy, I had Physics two years ago in High School and am now in Engineering Physics. I am trying to have a head start on everything and it is also a project, can anyone check my FDB for correctness? Thanks, Matt http://homepage.mac.com/jjacques2/fbd.gif
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