AEM 2021 Lecture 20: Equilibrium Problems 1-20-17
17 May 2017
School
Department
Course
Professor
Document Summary
N1 says bodies in rest stay at rest, and bodies in motion stay in motion unless acted by an outside force. The resultant of the forces should be 0. This means the x and y components are 0. We can use the conditions of equilibrium to solve for unknowns (forces) in one of two ways. In statics, the tails to tips should end at the starting point. This is only useful if there"s just 3 forces. For more than 3, use the algebraic method. Solve algebraically for unknowns (up to 2 unknowns) The tension force will be in direction of the cord. For an equilibrium problem, draw a free body diagram (fbd). Choose particle " choose particle that involves (experiences) the tensions, weight. In this case, point c. then draw a fbd of c. Tcax is negative because it goes in the -x direction. Recommended to set equal to 0 at start (less error prone).
