EQUILIBRIUM OF A RIGID BODY_PART 01

For more information: http://www.7activestudio.com [email protected] http://www.7activemedical.com/ [email protected] http://www.sciencetuts.com/ [email protected] Contact: +91- 9700061777, 040-64501777 / 65864777 7 Active Technology Solutions Pvt.Ltd. is an educational 3D digital content provider for K-12. We also customise the content as per your requirement for companies platform providers colleges etc . 7 Active driving force "The Joy of Happy Learning" -- is what makes difference from other digital content providers. We consider Student needs, Lecturer needs and College needs in designing the 3D & 2D Animated Video Lectures. We are carrying a huge 3D Digital Library ready to use. EQUILIBRIUM OF A RIGID BODY: Definition: Equilibrium is the state when all the external forces acting on a rigid body form a system of forces equivalent to zero. There will be no rotation or translation. The forces are referred to as balanced. A rigid body is said to be in rotational equilibrium, if the body does not rotate or rotates with constant angular velocity. For this, the net external torque or the vector sum of all the torques acting on the body is zero. A body is in rotational equilibrium, when algebraic sum of moments of all the forces acting on the body about a fixed point is zero. Partial Equilibrium: A body is said to be in partial equilibrium if it is in transnational equilibrium and not in rotational equilibrium or the body may be in rotational equilibrium and not in transnational equilibrium. Principle Of Moments:According to the principle of moments, a body will be in rotational equilibrium if algebraic sum of the moments of all forces acting on the body about a fixed point is zero. Center of Gravity: The center of gravity of a body is a point where the weight of the body acts and total gravitational torque on the body is zero. The center of gravity of the body coincides with the center of mass of the body. If the body is so extended that varies from part to part of the body, then the center of gravity shall not coincide with the center of mass of the body.The CG of a body of irregular shape can be determined by the following method. Suspend the body from some point such as A. Draw the vertical line AA1. It passes through CG.Similarly, draw vertical lines BB1 and CC1 by suspending the body from some other points B and C, etc. The point of intersection G of these verticals gives us the position of CG of the irregular body.