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**Unformatted text preview: **Log Out Contents Practice Personal Resources View Help Problems Book Home > Table of Contents > Chapter 3 > Problems Chapter 3: Equilibrium Particle PROBLEMS 3 1. Determine the magnitudes of F 1 and F 2 so that the particle is in equilibrium. Prob. 3 1 3 2. Determine the magnitude and direction θ of F so that the particle is in equilibrium. Prob 3 2 3 3. Determine the magnitude of F and the orientation θ of the 750-N force so that the particle is in equilibrium. 1/15 Engineering Mechanics: Statics and Dynamics: Chapter 3 2009-1-29 http://myphlip.pearsoncmg.com/altcc/faculty/ab2page.cfm?vbcid=10160&vi... Prob 3 3 * 3 4. Determine the magnitude and angle θ of F so that the particle is in equilibrium. Prob 3 4 3 5. The members of a truss are connected to the gusset plate. If the forces are concurrent at point O , determine the magnitudes of F and T for equilibrium. Take θ = 30 ° . 3 6. The gusset plate is subjected to the forces of four members. Determine the force in member B and its proper orientation θ for equilibrium. The forces are concurrent at point O . Take F = 12 kN. 2/15 Engineering Mechanics: Statics and Dynamics: Chapter 3 2009-1-29 http://myphlip.pearsoncmg.com/altcc/faculty/ab2page.cfm?vbcid=10160&vi... Prob 3 5/6 3 7. Determine the maximum weight of the engine that can be supported without exceeding a tension of 450 lb in chain AB and 480 lb in chain AC . Prob 3 7 * 3 8. The 200-kg engine is suspended from a vertical chain at A . A second chain is wrapped around the engine and held in position by the spreader bar BC . Determine the compressive force acting along the axis of the bar and the tension forces in segments BA and CA of the chain. Hint: Analyze equilibrium first at A , then at B . 3/15 Engineering Mechanics: Statics and Dynamics: Chapter 3 2009-1-29 http://myphlip.pearsoncmg.com/altcc/faculty/ab2page.cfm?vbcid=10160&vi... Prob 3 8 3 9. Cords AB and AC can each sustain a maximum tension of 800 lb. If the drum has a weight of 900 lb, determine the smallest angle θ at which they can be attached to the drum. Prob 3 9 3 10. The 500-lb crate is hoisted using the ropes AB and AC . Each rope can withstand a maximum tension of 2500 lb before it breaks. If AB always remains horizontal, determine the smallest angle θ to which the crate can be hoisted. Prob 3 10 4/15 Engineering Mechanics: Statics and Dynamics: Chapter 3 2009-1-29 http://myphlip.pearsoncmg.com/altcc/faculty/ab2page.cfm?vbcid=10160&vi... 3 11. Two electrically charged pith balls, each having a mass of 0.2 g, are suspended from light threads of equal length. Determine the resultant horizontal force of repulsion, F , acting on each ball if the measured distance between them is r = 200 mm. ...

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