ENS 204 • Mechanics • Midterm I + II

Introduction and Fundamental Concepts

Units of Measurement and Numerical Calculations

Vector Operations, Vector Addition of Forces

Resultant Force Example-1

Vector Components Example

Resultant Force Example-2

Addition of Coplanar Forces

Resultant of Coplanar Forces Example-1

Cartesian Vectors

Cartesian Vectors Example-1

Cartesian Vectors Example-2

Cartesian Vectors Example-3

Position Vectors, Unit Vector and Force Vector Along A Line

Position Vector Example-1

Force Vector Example-1

Position Vector Example-2

Position Vector Example-3

Dot (Scalar) Product of Vectors

Dot Product Example-1

Dot Product Example-2

Dot Product Example-3

Chapter Review

Equilibrium, How to Draw a Free Body Diagram (FBD)

Coplanar Force Systems (Equilibrium in 2D)

Coplanar Force Systems Example-1

Coplanar Force Systems Example-2

Three Dimensional Force Systems (Equilibrium in 3D)

Three Dimensional Force Systems Example-1

Three Dimensional Force Systems Example-2

Chapter Review

What is Moment?

Moment of a Force: Scalar Formulation

Moment of a Force: Vector Formulation

Moment of a Force Example-1

Moment of a Force Example-2

Moment of Force Components: Varignon's Theorem

Moment of Force Components Example

Moment of a Force About an Axis

Moment About an Axis Example

Moment of a Couple

Moment of a Couple Example-1

Moment of a Couple Example-2

Simplification of a Force and Couple System

Reduction to a Given Point Example

Further Simplifications of a Force and Couple System

Reduction to a Single Force Example

Reduction of a Parallel Force System Example

Reduction of a Simple Distributed Loading

Distributed Loading Example

Chapter Review

Equilibrium in Two Dimensions

Free Body Diagram Example-1

Free Body Diagram Example-2

Equations of Equilibrium in 2-D

Equilibrium in 2-D Example-1

Equilibrium in 2-D Example-2

Equilibrium in 2-D Example-3

Equilibrium in 2-D Example-4

Two and Three Force Members

Equilibrium in Three Dimensions

Free Body Diagram in 3-D Example

Equations of Equilibrium in 3-D

Equilibrium in 3-D Example

Constraints and Statical Determinacy

Chapter Review

Simple Trusses, Method of Joints

Method of Joints Example-1

Method of Joints Example-2

Zero Force Members (ZFMs)

Zero Force Members Example

Method of Joints Example-3

Method of Sections

Method of Sections Example-1

Method of Sections Example-2

Space Trusses

Space Trusses Example

Frames and Machines

Frames and Machines Example-1

Frames and Machines Example-2

Frames and Machines Example-3

Chapter Review

Internal Loadings in Structural Members

Internal Loadings at a Point Example-1

Internal Loadings at a Point Example-2

Shear and Moments Equations and Diagrams: Method of Sections

Diagrams with Method of Sections Example-1

Diagrams with Method of Sections Example-2

Relations Between Internal Loads: Graphical Approach

Diagrams with Graphical Approach Example-1

Diagrams with Graphical Approach Example-2

Cables with Concentrated Loads

Cables with Concentrated Loads Example

Cables with Distributed Loads

Cables with Distributed Loads Example

Cables with Their Own Weight

Chapter Review

Characteristics of Dry Friction

Friction Example-1

Friction Example-2

Wedges

Wedges Example

Frictional Forces on Flat Belts

Friction Belts Example-1

Friction Belts Example-2

Chapter Review

Vectors (Resultant and Components Along Given Axes)

Vectors (3D Vectors and Direction Cosines)

Equilibrium in of a Particle

Equilibrium of a Particle in 2D

Equilibrium of a Rigid Body in 2D

Equilibrium of Rigid Body in 2D

Moment of a Couple in 3D

Moment of a Force About an Axis

Equilibrium of a Rigid Body in 3D

Equilibrium for Rigid Body in 3D

Equilibrium of Rigid Body in 3D

Equilibrium of Rigid Body in 3D

Structural Analysis: Trusses

Structural Analysis: Trusses

Structural Analysis: Frames and Machines

Structural Analysis: Frames and Machines

Internal Forces: Shear Force and Moment Diagrams

Internal Forces: Shear Force and Moment Diagrams