Example Problem Solutions from:

Engineering Mechancis: Statics and Dynamics

by Anthony Bedford and Wallace Fowler
Fourth Edition, Pearson Prentice Hall, Upper Saddele River, NJ 2005

Authors' Homepages: Anthony Bedford Wallace Fowler

Chapter 4: Systems of Forces and Moments

"The effects of forces can depend not only on their magnitudes and directions but also on the moments, or torques, they exert. The rotations of objects such as the wheels of a vehicle, the crankshaft of an engine, and the rotor of an electric generator result from the moments of the forces exerted on them. If an object is in equilibrium, the moment about any point due to the forces acting on the object is zero. Before continuing our discussion of free-body diagrams and equilibrium, we must explain how to calculate moments and introduce the concept of equivalent systems of forces and moments."

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