Rigid body

1. 1. Fundamentals statics of rigid body ◆ Statics: Statics is the study of rigid bodies that are stationary. To be stationary, a rigid body must be in equilibrium. In the language of statics, stationary rigid body has no unbalanced forces acting on it. ◆ Force: Force is a push or a pull that one body exerts on another, including gravitational, electrostatic magnetic and constant influences. Force is a vector quantity, having a magnitude, direction and point of application . Week 1 Static:

2. 1. Fundamentals statics of rigid body Week 1 Static:

3. 1. Fundamentals statics of rigid body ◆ Moment: Moment is the name given to the tendency of a force to rotate, turn or twist a rigid body about an actual or assumed pivot point. Moments have primary dimensions of length force. The direction cosines of a force can be used to determine the components of the moment about the coordinate axes. Week 1 Static:

4. 1. Fundamentals statics of rigid body ◆ Systems of Forces: Any collection of forces and moments in three-dimensional space is statically equivalent to a single resultant force vector plus a single resultant moment vector. Week 1 Static:

5. 1. Fundamentals statics of rigid body ◆ Equilibrium Requirements : An object is static when it is stationary. To be stationary, all of the forces on the object must be in equilibrium . And resultant force and moment vectors must be both be zero . Week 1 Static: