1) Draw a Global Free Body Diagram (FBD)

2) Make a cut in the global FBD and draw the cut FBD

3) Write out the equations of motion required to solve

4) Solve the global equations of motion (units are important, PLEASE include them, it will help teach you how to make sure you solving the EOM correctly if you balance your units as you solve)

P 2x Problems (from Gere and Goodno, 9th edition): 1.7-1 A high-strength steel bar used in a large crane has a diameter d = 2.00 in. (see figure). The steel has a modulus of elasticity E= 29 x 106 psi and Poisson's ratio is v= 0.29. Because of clearance requirements, the diameter of the bar is limited to 2.001 in. when it is compressed by axial forces. What is the largest compressive load Pmax that is permitted? PROBLEM 1.7-1 Global FBD 2x=0 P-P=O 0=0 Cut FBD Nac 1 SEX=00 -N-P=O N=-P P axial 0.00 EOM Elateral = - Eakhal {Fx=0 AL Ad = - J J= artal L 0.001 -0.29 = +0.29 perpendicular 1000 165= 1 Kip smar LEA Pmax 29x10p Lemax = 157,000 165 EE axial Eaxlal = ops (+(240))) Psi Jovial - A Janial -Pmak or 157 kips -Prax Easial = EA