ef152-lec-2-2 - 1 . 8 m 56 kg 2 5 EF 152 Spring, 2009...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
EF 152 Spring, 2009 Lecture 2-2 1 Module 2, Lecture 2 •S t a t i c s , F BD •S t a b i l i t y How much does the Leaning Tower of Pisa lean? A. 1° B. 2° C. 3° D. 4° E. 5° EF 152 Spring, 2009 Lecture 2-2 2 Example: Ladder Leaning Against a Wall Given: A ladder leans against a frictionless wall. Required: Angle between ladder and ground when it starts to slip. Moment of N W about base is: A. Positive B. Negative Moment of N W about base is: A. N W L B. N W Lsin θ C. N W Lcos θ D. N W Ltan θ E. N W Lsin θ + N W
Background image of page 1

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

View Full DocumentRight Arrow Icon
Background image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: 1 . 8 m 56 kg 2 5 EF 152 Spring, 2009 Lecture 2-2 4 Example: Step Ladder 56 kg EF 152 Spring, 2009 Lecture 2-2 5 Stability If an object is in equilibrium, and given a small displacement, there are three possibilities: _______ equilibrium: object returns to original position Example: ball hanging from a string __________ equilibrium: object moves further away from original position Example: pencil balanced on point _________ equilibrium: object stays at new position Example: sphere on a flat table Neutral Unstable Stable EF 152 Spring, 2009 Lecture 2-2 6 Example: Stability A truck is parked on an inclined road as shown. Determine the slope of the road that causes the truck to tip over. Center of mass 2.4 m 1.6 m 2.2 m...
View Full Document

Page1 / 2

ef152-lec-2-2 - 1 . 8 m 56 kg 2 5 EF 152 Spring, 2009...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online