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International Edition---engineerin...

4th Edition
Andrew Pytel And Jaan Kiusalaas
Publisher: CENGAGE L
ISBN: 9781305501607
Chapter 10, Problem 10.9P
Textbook Problem
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The four-bar linkage supports the homogeneous box of weight W. Neglecting the weight of the linkage, determine the horizontal pin reactions at A and B.

Chapter 10, Problem 10.9P, The four-bar linkage supports the homogeneous box of weight W. Neglecting the weight of the linkage,

To determine

Horizontal pin reaction at point A and B

Explanation of Solution

Given information:

Weight of linkage is negligible.

Virtual work δU done by force F is defined as:

  δU=F.δr=Fcosαδr

In above equation

F - Force

δr - Virtual force

α - Angle between F and δr

Virtual displacement δrB of point B is defined as:

  δrB=rABδθ

In above equation

  δθ - Virtual rotation

  rAB - Magnitude of vector drawn from A to B

Calculation:

The length xB

  xB=bsinθ

The virtual displacement δxB

  δxB=bcosθδθ

The length yB

  yB=(2a+b)cosθ

The virtual displacement δyB

 &

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Chapter 10 Solutions

International Edition---engineering Mechanics: Statics, 4th Edition
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