A spring AB of constant k is attached to two identical gears as shown. Knowing that the spring is undeformed when 0, = determine two values of the angle corresponding to equilibrium when P = 30 lb, a = 4 in., b = 3 in., r = 6 in., and k = 5 lb/in. State in each case whether the equilibrium is stable, unstable, or neutral.
Chapter 1 Who is 1. Wolmar Fellenius He’s the port engineer in Sweden, a professor at the royal institute of technology in stockhom and the chairman of geotechnical commission of the Swedish state railways. He conducted the first large scale geotechnical studies and developed exploration, sampling, testing and analysis techniques. 2. Karl Terzaghi Also known as the father of soil mechanics. In 1916, he began his research on the behavior of soils, including the studies of piping failures in sand beneath sand and settlement clays 3. Ralph Peck He developed the observational method and applied this approach to solving engineering problems. With the knowledg