Engineering Statics | P3/84 | 3D Equilibrium | Chapter 3 | 6th ed | Engineers Academy

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Engineering Statics by Meriam and Kraige
Engineering Statics | P3/84 | 3D Equilibrium | Chapter 3 | 6th ed | Engineers Academy

Chapter 3: Equilibrium
3/84 The spring of modulus k=900 N/m is stretched a distance of 60 mm when the mechanism is in the position shown. Calculate the force Pmin required to initiate rotation about the hinge axis BC, and determine the corresponding magnitudes of the bearing forces which are perpendicular to BC. What is the normal reaction force at D if P=Pmin/2?

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Why are we not considering reaction forces along y axis and moments also?

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