If the beam is subjected to a shear of V = 15 kN, determine the web's shear stress at A and B. Indicate the shear-stress components on a volume element located at these points. Set w = 125 mm. Show that the neutral axis is located at y = 0.1747 m from the bottom and INA = 0.2182(10-3 ) m4 .
Introduction (Part 1) What is mechanics The science that describes and predicts the conditions of rest or motion of bodies under the action of forces. What happens to this body o Does it move (Dynamic) o Does it stay still (Static) o Does it deform/ deflect Mechanics is Comprised of Multiple Topics Rigid bodies o Statics o Dynamics Deformable bodies o Mechanics of materials Fluids o Incompressible o Compressible We Will Focus on Rigid Bodies Statics deals with bodies at rest. Dynamics deals with bodies in motion. Mechanics is the Foundation for Mechanical Engineering. Introduction (Part 2) Fundamental Concepts and Principles Mechanics Space Force Time Mass Force Point of application Magnitude Direction Six Fundamental Principles of Mechanics The parallelogram law for addition of forces The principle of transmissibility Newton's first law of motion Newton's second law of motion Newton's third law of motion Newton's law of gravitation System of Units and Converting Between Two Systems of Units Always use matching units when solving a problem. Always be sure that the final answer has the appropriate units. If the units do not match, convert them. Method of Solving Problems Strategy: Read and fully understand a problem before beginning to solve it. Identify all given values and desired unknowns. Thin