ENGG130 Chapter Notes - Chapter 5: Resultant Force, Centroid, Statics

• School: University of Alberta
• Department: Engineering, General
• Course: ENGG130
• Professor: Mustafa Gul

Document Summary

Statics chapter 5 equilibrium of a rigid body. The force and couple moment system acting on a body can be reduced to an equivalent resultant force and resultant couple moment at any arbitrary point o on or off the body. If this resultant force and couple moment are both equal to zero, the body is said to be in equilibrium. First eq"n: the sum of the forces acting on the body is equal to zero. Second eq"n: sum of the moments of all the forces in the system about point o, added to all the couple moments, is equal to zero. To show this, consider summing moments about some other point, such as point a; we require: Since r does not equal zero, this equation is satisfied if eq"n 5-1 is satisfied, namely. When applying the equations of equilibrium, we will assume that the body remains rigid.