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Principles of Statics
 Components of a Force
 Moment of a Force

Couples
 245  Couple in the box
 246  System with couples and forces on it
 247  Resultant of couples in a 3step pulley
 248  Broken handwheel replaced by lever to close a gate valve
 249  Reactions at the bolts of speed reducer gear box
 250 Reaction at the supports of cantilever truss
 251 Two forces producing a couple and a force
 252 Equivalent single force for a force and a couple
 253254 Equivalent single force to replace a force and a couple
 255 Equivalent loads to a compression member with eccentric load
 256 Twisting and bending effects
 257 Horizontal couple equivalent to vertical forces
 258 Equivalent horizontal and vertical couples
 Resultant of Concurrent Force System
 Resultant of Parallel Force System
 Resultant of NonConcurrent Force System
 Equilibrium of Force System
 Analysis of Structures
 Friction
 Centroids and Centers of Gravity
 Moment of Inertia and Radius of Gyration
 Dynamics
 Force Systems in Space
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 400000=120[14π(D2−10000)]
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