Lecture 23 sect 5.6

# Lecture 23 sect 5.6 - The moment equation may also be...

This preview shows pages 1–12. Sign up to view the full content.

ME 221 Lecture 23 1 ME 221 Statics Lecture #23 Sections 5.6 & 5.7

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
ME 221 Lecture 23 2 Homework #8 Chapter 9 problems: Chapter 5 problems: Due Today
ME 221 Lecture 23 3 Homework #9 Chapter 5 problems: Due Friday, October 31

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
ME 221 Lecture 23 4 Quiz #5 Today
ME 221 Lecture 23 5 Last Lecture Equilibrium equations Free body diagrams Modeling supports

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
ME 221 Lecture 23 6 Today Equilibrium in 3 Dimensions Statically Indeterminate Reactions
ME 221 Lecture 23 7 Equilibrium Equations We have examined 2-dimensional systems and analyzed their equilibrium conditions using the following: ~ ~ 0 and 0 F M = = The equilibrium conditions we used may be expressed as: 0 0 0 0 0 0 x x y y z z F M F M F M = = = = = =

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
ME 221 Lecture 23 8 Equilibrium Equations For 3-dimensional systems, we use the same equilibrium equations, except we write them in vector form:

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document

This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: The moment equation may also be written as: ∑ ∑ = = M & F o Where the couple C is the sum of all applied couples on the body ∑ = + C ) F x r ( ME 221 Lecture 23 9 Equilibrium Equations If there are more than 6 unknown forces or couples, the problem is statically indeterminate. ME 221 Lecture 23 10 Solving Equilibrium Equations Draw a proper free body diagram Write each force and couple as a vector Draw position vectors from the origin to the line of action of each force Write the vector equations of static equilibrium – 6 equations, 6 unknowns ME 221 Lecture 23 11 Statically Indeterminate Reactions Underconstrained system Cannot maintain equilibrium Overconstrained systems More unknown forces than equations ME 221 Lecture 23 12 Quiz #5...
View Full Document

{[ snackBarMessage ]}

### Page1 / 12

Lecture 23 sect 5.6 - The moment equation may also be...

This preview shows document pages 1 - 12. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online