Chapter 5B Rotational Equilibrium

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<strong>Equilibrium</strong>• An object is said to be in equilibrium ifand only if there is no resultant forceand no resultant torque.FirstCondition:Fx0; F 0ySecondCondition: 0
Does <strong>Equilibrium</strong> Exist?T30 0Is YES! the system Observationleft inshows equilibrium that no part both ofthe translationally system is changing andits state rotationally? of motion.A sky diver moments after the jump? Yes or NoNo?A sky diver who reaches terminal speed? YesA fixed pulley rotating at constant speed? Yes
Page 2 and 3: The Golden GateBridge providesan ex
Page 4 and 5: Translational EquilibriumCar at res
Page 8 and 9: Statics or Total EquilibriumStatics
Page 10 and 11: Review: Free-body Diagrams• Read
Page 12 and 13: Example 1 (Continued). Find A and B
Page 14 and 15: Example 2. Find tension in ropes A
Page 16 and 17: Total EquilibriumIn general, there
Page 18 and 19: Example 3: Find the forces exerted
Page 20 and 21: Example 3: (Cont.)Rotational Equili
Page 22 and 23: Example 3 (Cont.)TranslationalEquil
Page 24 and 25: Reminder on Signs:Absolute valuesap
Page 26 and 27: T30 0Example 4(Cont.)F yF x5 m200 N
Page 28 and 29: Center of GravityThe center of grav
Page 30 and 31: Example 5: Find the center of gravi
Page 32 and 33: Summary: Procedure• Draw free-bod

Chapter 5B Rotational Equilibrium

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