Section 5.1 Conditions for Rigid Body Equilibrium EQUATIONS OF EQUILIBRIUM (page 200) page 1 F1 F 4 0. F3 F2 M1 (a) Figure: 05_001a Copyright @2013 Pearson Education, publishing as Prentice Hall · Figure 5-01 (a) M2 The figure shows a rigid body acted on by forces and couples.
Section 5.1 Conditions for Rigid Body Equilibrium EQUATIONS OF EQUILIBRIUM (page 200) page 2 (MR)0= 0 FR = 0 O (b) Figure: 05_001b Copyright @2013 Pearson Education, publishing as Prentice Hall · Figure 5-01 (b) The figure shows the resultant force Fp and resultant couple moment (MR), acting at an arbitrary point O.
Section 5.1 Conditions for Rigid Body Equilibrium EQUATIONS OF EQUILIBRIUM (page 200) page 3 · Equilibrium A rigid body is in equilibrium if it remains at rest if originally at rest or has constant linear velocity and constant angular velocity if originally in motion. · Equations of equilibrium Newton's First Law of Motion for a rigid body: F = ! ? = 0 (MR)Q= ! M + !(F " }) = 0 These two vector equations are the equations of equilibrium for a rigid body.