static equilibrium

Examples of static equilibrium in the following topics:

• Second Condition

  • The second condition of static equilibrium says that the net torque acting on the object must be zero.
  • A child's seesaw, shown in , is an example of static equilibrium.
  • An object in static equilibrium is one that has no acceleration in any direction.
  • If a given object is in static equilibrium, both the net force and the net torque on the object must be zero.
  • The system is in static equilibrium, showing no acceleration in any direction.

• Static Equilibrium

  • Any region or point, or any static object within a static fluid is in static equilibrium where all forces and torques are equal to zero.
  • Static equilibrium is a particular state of a physical system.
  • As it pertains to fluidics, static equilibrium concerns the forces acting on a static object within a fluid medium.
  • For static equilibrium to be achieved, the sum of these forces must be zero, as shown in .
  • This figure shows the equations for static equilibrium of a region within a fluid.

• Conductors and Fields in Static Equilibrium

  • In the presence of charge or an electric field, the charges in a conductor will redistribute until they reach static equilibrium.
  • Once the charges are redistributed, the conductor is in a state of electrostatic equilibrium.
  • It should be noted that the distribution of charges depends on the shape of the conductor and that static equilibrium may not necessarily involve an even distribution of charges, which tend to aggregate in higher concentrations around sharp points.
  • Describe behavior of charges in a conductor in the presence of charge or an electric field and under static equilibrium

• First Condition

  • The first condition of equilibrium is that the net force in all directions must be zero.
  • For an object to be in equilibrium, it must be experiencing no acceleration.
  • The condition $F_\text{net} = 0$ must be true for both static equilibrium, where the object's velocity is zero, and dynamic equilibrium, where the object is moving at a constant velocity.
  • Below, the motionless person is in static equilibrium.
  • This car is in dynamic equilibrium because it is moving at constant velocity.

• Stability, Balance, and Center of Mass

  • An object in static equilibrium remains in the same state forever, but not all forms of equilibrium are the same.
  • A bridge can be in static equilibrium despite the fact that there are multiple forces and torques being applied to the bridge.
  • Anytime when you observe something that appears to have no linear or angular acceleration, it must be in static equilibrium.
  • For an object to be in static equilibrium, we expect it to stay in the same state indefinitely.
  • Explain the relationship between how center of mass is defined and static equilibrium

• Translational Equilibrium

  • A large part of engineering creations are static objects.
  • In both cases – static or dynamic – net external forces and torques are zero.
  • The first type, where all particles in the system are at rest and do have not velocity, is known as static equilibrium.
  • Static or dynamic, these kinds of equilibrium can be categorized as translational equilibrium.
  • Since neither the table nor the book are moving, this is an example of static equilibrium.

• Equilibrium

  • There are no forces (from buyers or sellers) that will alter the equilibrium price or equilibrium quantity.
  • This is a mechanical, static conception of equilibrium.
  • Neoclassical economics uses "comparative statics" as a method by which different states can be analyzed.
  • General equilibrium is a condition where all agents acting in all markets are in equilibrium at the same time.
  • Neoclassical microeconomics tends to focus on partial equilibrium.

• Problem-Solving Techniques

  • When solving static problems, you need to identify all forces and torques, confirm directions, solve equations, and check the results.
  • Statics is the study of forces in equilibrium.
  • There are forces acting, but they are balanced -- that is to say, they are "in equilibrium. "
  • When solving equilibrium problems, it might help to use the following steps:
  • First, ensure that the problem you're solving is in fact a static problem—i.e., that no acceleration (including angular acceleration) is involvedRemember:$\sum F=ma=0$ for these situations.

• Clearing the Market at Equilibrium Price and Quantity

  • When a market achieves perfect equilibrium there is no excess supply or demand, which theoretically results in a market clearing.
  • This equilibrium point is represented by the intersection of a downward sloping demand line and an upward sloping supply line, with price as the y-axis and quantity as the x-axis .
  • At perfect equilibrium there is no excess demand (represented by 'A' in the figure) or excess supply (represented by 'B' in the figure), which theoretically results in a market clearing.
  • Even in static markets there is competitive consolidation that allows companies to charge differing price points than that of the equilibrium.
  • The equilibrium point is where market clearing will theoretically occur.

• Changes in Demand and Supply and Impacts on Equilibrium

  • Alterations to overall supply or demand dictate the cross-section or equilibrium, ascertaining price and volume for a product or service.
  • In a static market it would be reasonable to assume that prices and volumes would remain fairly predictable and consistent relative to the population, but realistic markets are not static.
  • Alternately, a decrease in demand will shift price downwards and volume to the left, decreasing both measurements to realign equilibrium with a reduced demand.
  • More of a given product, assuming the same demand, will result in lower price points at the equilibrium.
  • Illustrate how changes in supply or demand impact the market equilibrium