Material Science And Metallurgy By Kodgire Pdf Free 181
download online ebook of A free online edition of this book is available at www.intechopen.com. An Overview of Metalworking Tooling. Free body diagrams are built around force diagrams that demonstrate the interaction of force lines. According to the three-dimensional nature of the interacting forces, their net effect is to produce a resultant force. The introduction to equilibrium shows the force diagrams to be a convenient tool to analyze the equilibrium of a system and to explain the various forces acting on an object. Free body diagrams for systems of rigid bodies include the following. The earth is a system of rigid bodies, each of which is held in its place by the force of gravity acting on it. The mass m, combined with the weight W, produces a vertical force Fz at its center of gravity. The net force on a body is the sum of all the forces acting on it. Introduction In the theory of dynamics, it is a well known fact that the balance equations of a system are given by. where is the mass of the system, is the net force acting on it, is the mass moment of inertia, is the acceleration of the system, is the angle between the axes of the coordinate system and the principal axes of the body, is the rate of change of the angle, is the angular momentum, is the angular velocity, and is the torque. The equation of motion is where is the acceleration. If the system has no external forces, then . In free fall, the centre of mass is not displaced and so the net force Fc is zero. The net force acting on a body depends on its mass and the vectors of the forces acting on it. So, the system can be represented by two force diagrams, as shown in the figure to the left. The horizontal axis represents the force Fx (Fz being along the vertical axis). The left-hand side diagram shows the "clockwise" force diagram, showing the forces acting on the system in the direction of rotation. The right-hand diagram shows the "counter-clockwise" force diagram, which is symmetrical to the left-hand side force diagram. In mechanics, Newton’s second law states that. The net force acting on a body is the sum of the forces acting on it, and the net force is equal to the resultant force acting on the body, because the body does not change its acceleration.