The given truss below is loaded vertically downward with 4KN and 8KN at points C and D, respectively, as shown. A model of the truss was made in a laboratory, and it was found out that the values of internal forces in members A- L, A-B, and B-K are as indicated in the table. If the vertical reactions at A and G are 6.667 KN and 5.333 KN respectively, complete the table and answer the succeeding questions. Approximate all answers up to three decimal places. What is the computational internal force of Member A-L? 8 kN 4 kN D. B 3 m K J I 12 m. 6 @ 2 m Member Experimental 13.533 14.680 Computational Percent Error A-L A-B BK 0.012 O 13.334KN O 15.781KN O 14.908KN
Rigid Body
A rigid body is an object which does not change its shape or undergo any significant deformation due to an external force or movement. Mathematically speaking, the distance between any two points inside the body doesn't change in any situation.
Rigid Body Dynamics
Rigid bodies are defined as inelastic shapes with negligible deformation, giving them an unchanging center of mass. It is also generally assumed that the mass of a rigid body is uniformly distributed. This property of rigid bodies comes in handy when we deal with concepts like momentum, angular momentum, force and torque. The study of these properties – viz., force, torque, momentum, and angular momentum – of a rigid body, is collectively known as rigid body dynamics (RBD).
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