Calendar: 1878-1879 Page 323

evening classes 231 Statics Pressure-Meaning of the term-It varies in amount and direction-The measure of this amount- Illustrations of Pressures in different directions producing Equilibrium In Statics Force is used as Synonyme of Pressure The graphical representation of the point of application direction and amount of Statical Force-Composition and resolution of Statical Forces The Parallelogram of Forces-The Triangle of Forces-The Resultant of any number of Forces applied at the same point and whose directions lie in the same Plane-General condi- tions of the Equilibrium of Forces whose directions lie in the same Plane-The Principle of Moments The Composition and Resolution of Parallel Forces-The Centre of Parallel Forces-The Centre of Gravity of Body Conditions determining the Stability of Body-Ulustra- tions of this The Mechanical Powers statically considered-Definition of Machine No Machine can intensify the energy of Force What is gained in power is lost in speed The Force of Friction Dynamics -The Units of Space Time and Quantity of Matter The term "Velocity"-Newton's First Law of Motion-the Inertia of Matter-A change of Velocity or Direction implips the existence of some exterior Force Newton's Second Law of Motion and the Parallelogram of Velocities Dynamical Force is measured by the Velocity which it would add to unit of Matter in 1" an inference from Newton's Third Law of Motion Nature of the Proofs of the Laws of Motion The Force of Gravity The Motion of Projectiles-Motion down Smooth Inclined Plane-Motion in Curve-The simple Pendulum-Centrifugal Force The Elasticity of Bodies Their direct Collision χ