Solution Manual for Orthopaedic Biomechanics Mechanics and ... › sample › Solution-Manual... · For the exclusive use of adopters of the book Orthopaedic Biomechanics: Mechanics

© 2007 Pearson Education, Inc., Upper Saddle River, NJ. All rights reserved. For the exclusive use of adopters of the book Orthopaedic Biomechanics: Mechanics and Design in

Musculoskeletal Systems, by Donald L. Bartel, Dwight T. Davy, and Tony M. Keaveny. ISBN 0-13-008909-5

Solution Manual for Orthopaedic Biomechanics Mechanics and Design in Musculoskeletal Systems by Bartel

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2.5

2 2 2 2

2 2 2 2

2 2 2 2

moments about the shoulder

( ) ( )

RHS of the equation

( ) ( ) ( )

( )

( ) ( )

S L L h b L h cm

u L u u u L L u L h b h u L h

u u L u L h u L h

u L u u u L L u

M m gd m m g L d I d mr

I I d m a m a L d m m a L L d

a d a L d a L L d

I I d m L d m L

α

α

α α α

α α α

− − + + = + ×

+ + + + + + + +

= = + = + +

+ + + + + +

∑

( )

( )

2

2 2 2 2 2

( ) ( )

solving for the moment

( ) ( ) ( ) ( ) ( )

substituting values yields12.02

moments about the elbow

( ) ( )

L h h b

S L L h b L h u L u u u L L u L h h b

S

E L L h b L h cm

L d m m

M m gd m m g L d I I d m L d m L L d m m

M N m

M m gd m m g L d I

α

α

α

+ +

⎡ ⎤= + + + + + + + + + + + +⎣ ⎦

= ⋅

− − + + =

( )( )

22

22

( ) ( ) ( )

( ) ( ) ( )substituting values yields

10.66

E L L h b L h L L L h h b

E L L h b L h L L L h h b

E

d mr

M m gd m m g L d d m L d m m

M m gd m m g L d d m L d m m

M N m

α α

α α

+ ×

− − + + = + + +

= + + + + + + +

= ⋅

∑



















































































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Solution Manual for Orthopaedic Biomechanics Mechanics and ... › sample › Solution-Manual... · For the exclusive use of adopters of the book Orthopaedic Biomechanics: Mechanics