Example Problem Solutions from:

Engineering Mechanics: Statics & Dynamics

by R. C. Hibbeler
Tenth Edition, 4th Edition, Pearson Prentice Hall, Upper Saddle River, NJ 2004

Author's Homepage: R. C. Hibbeler

Chapter 11 Virtual Work

"Work of a Force. In mechanics a force F does work only when it undergoes a displacement in the direction of the force. For example, consider the force F in Fig. 11-1, which is located on the path s specified by the position vector r. If the force moves along the path to a new position rp = r + dr, the displacement is dr, and therefore the work dU is a scalar quantity defined by the dot produce du = dot(F, dr)."

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