- Conditions for Equilibrium
- Lecture (16:25)
*The conditions for equilibrium of an object: balance of forces and balance of torques*- Stability/Instability and Center of Gravity
- Lecture (14:36)
*Distinction of stable and unstable equilibrium, and center-of-gravity as a variation of center-of-mass when the gravitational force is not constant across a system*- Solving rigid-body equilibrium problems
- a) Crane Boom Example (11:45)
*Solving for the tension in an extended crane boom in equilibrium*- b) Fireman Ladder Example (21:52)
*Solving for the force on the foot of a ladder with a fireman also on the ladder*- c) Pulley System Examples (19:30)
*Solving for the tensions in several Atwood machines in equilibrium, and the concept of mechanical advantage*- Stress, strain, and elastic moduli
- Lecture (19:58)
*Definition of tension, shearing, and bulk stress*- Elasticity and Plasticity
- Lecture (16:41)
*Discussion of the elastic limit of materials, and permanent plastic deformation or rupture beyond it. An example given of a stretched wire*