{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Chapter_12

# Chapter_12 - Chapter 12 Static Equilibrium and Elasticity...

This preview shows pages 1–5. Sign up to view the full content.

Objects in static equilibrium don’t move. Of special interest to civil and mechanical engineers and architects. We’ll also learn about elastic (reversible) deformations . Plastic deformations are irreversible (like play dough) Chapter 12: Static Equilibrium and Elasticity Reading assignment: Chapter 12.1 to 12.4 Homework : QQ1, QQ3, OQ9, AE2, 3, 8, 11, 27, 28, 39, 49 Due date: Friday, April 8

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

View Full Document
Objects in static equilibrium don’t move or rotate. Conditions for static equilibrium
Conditions for static equilibrium (For extended objects) 1. The net force acting on the particle must be zero. 2. The net torque about any axis acting on the particle must be zero. 3. The angular and linear speeds must be zero. 0 = F 0 = τ We restrict ourselves to forces in the x-y plane. Thus: 0 = x F 0 = z τ 0 = y F

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

View Full Document
Center of gravity Consider an extended object. - The gravitational force mg always acts on the center of gravity ! - The center of gravity is equal to the center of mass (see Chapter 9).
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

### Page1 / 15

Chapter_12 - Chapter 12 Static Equilibrium and Elasticity...

This preview shows document pages 1 - 5. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online