final examination study set 1 (solutions will be in the...

Final Examination Study Set 1

(Solutions will be in

the Solutions Manual of Textbook)

Final Examination Study Set 2

(Solutions will be in

the Solutions Manual of Textbook)

The shaft, lever, and handle are welded together and consitute a single rigid body. Their combined mass is 28kg with mass centre at G. The assembly is mounted in bearings A and B, and rotation is prevented by link CD. Determine the forces exerted on the shaft by bearings A and B while the 30 N•m couple is applied to the handle as shown? Would these forces change if the couple were applied to the shaft AB rather than to the handle?

3/86

Determine the compression force C exerted on the can for an applied force P=50N when the can crusher is in the position shown. Note that there are two links AB and two links AOD, with one pair of linkages on each side of the stationary portion of the crusher. Also, pin B is on the vertical centerline of the can. Finally, note that small square projections E of the moving jaw move in recessed slots of the fixed frame. Ans: C = 249 N

4/109

Engineering Statics Full Course Overview and

Final Exam Guidelines

(Statics MRU Spring 2012 Kaitlin Ford)

REVIEW FOR FINAL

Outline:

Exam Format and Content

Tips and Strategies

Course Review

Review Problems

EXAM – FORMAT

Thursday, June 21

9 a.m. to noon(3 hours)

Room: B101

Allowed one page (8½ x 11) both sides handwritten notes

Allowed pencil, pen, eraser, calculator, ruler

You will be given a table of centroids

7 full solution questions

COVERS THE ENTIRE COURSE!

EXAM – GENERAL TIPS

Get enough sleep the night before

Eat well

Show up early

Read all of the instructions

Pay attention to the time and total number of marks

Read all of the questions

Attempt all questions

Stay positive and calm

EXAM – STATICS TIPS Start every question (MARKS!)

Write givens and finds

Draw a nice diagram (FBD)

Write equations of equilibrium

Make your solutions tidy

Don’t crowd your work

Draw clear, large, labeled diagrams

Explain your work (words, equations, assumptions)

Check answers

** Chapter 2 Review Slides have more detailed tips**

COURSE REVIEW – CHAPTER 1

Chapter 1

Introduction and Background Material

Types of Questions:

Chapter covers basic skills, you need to know this material to do all other chapters.


Properties of Forces

Two Dimensional Force Systems Rectangular components

Moment

Couple

Resultants

Three Dimensional Force Systems Rectangular components

Moment

Couple

Resultants

Need unit vectors


Types of Questions:

Resultant Force (𝐑 = 𝚺𝐅)

Moment about a point

Moment about a line

Moment of a couple

Equivalent couples

Equivalent systems

Reduction of systems

Again, chapter covers basic skills, you need to know this material to do all other chapters.


Chapter 3 - EQUILIBRIUM

Free-Body Diagrams

Reactions at supports and connections

Equilibrium in Two-Dimensions

2 & 3 force bodies

Constraints & determinacy

Equilibrium in Three-Dimensions

Types of Questions:

Rigid Body Equilibrium (∑F = 0, ∑M = 0) 2D or 3D


Chapter 4 - STRUCTURES

Trusses

Method of Joints

Special Cases

Method of Sections

Frames

Machines

Types of Questions:

• Find force in member(s), and/or reactions


Chapter 5 – Distributed Forces

• Centres of Mass and Centroids

Composite Bodies

• Beams – External Effects & Internal Effects

Types of Questions:

•Find centroid (composite)

•Find reactions at end of beam with distributed loads

•Draw shear and/or bending moment diagrams

•Find maximum values of shear or bending


Chapter 6 – Friction

oDry Friction

oImpending motion

Types of Questions:

oEquilibrium with Friction Force acting

oWill it slide? (versus stay still or tip)

oWhat force will keep it in equilibrium

REVIEW QUESTION – CHAPTER 3 & 5

The framework is supported by the member AB which rests on the smooth floor. When loaded, the pressure distribution on AB is linear as shown. Determine the smallest length d of member AB so that it will prevent the frame from tipping over. What is the intensity w for this case?

REVIEW QUESTION – CHAPTER 3 & 5 Given: See the diagram

Find: Smallest d for no tipping (NO MOTION) therefore equilibrium & w

smallest d

REVIEW QUESTION – CHAPTER 5

The beam will safely support shear forces and bending moments of magnitudes 2 kN and 6.6 kNm respectively. On the basis of this criterion, can it safely be subjected to the loads F = 1 kN and C = 1.6 kNm?

REVIEW QUESTION – CHAPTER 5 Given: MAX Shear Force is 2kN

MAX Bending moment is 6.6kN*m

Dimensions on FBD

Find: Can the beam safely support F=1kN & C=1.6kN*m?


Determine the horizontal and vertical components of reaction at the pin supports A and E of the compound beam assembly.


The hinged frames ACE and DFB are connected by two hinged bars, AB and CD, which cross without being connected. Compute the force in AB. TEXT – SEE 4/46 on page 195

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