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  2. Moment (physics) - Wikipedia

    en.wikipedia.org/wiki/Moment_(physics)

    The moment of force, or torque, is a first moment: =, or, more generally, .; Similarly, angular momentum is the 1st moment of momentum: =.Momentum itself is not a moment.; The electric dipole moment is also a 1st moment: = for two opposite point charges or () for a distributed charge with charge density ().

  3. Method of simulated moments - Wikipedia

    en.wikipedia.org/wiki/Method_of_simulated_moments

    In econometrics, the method of simulated moments (MSM) (also called simulated method of moments [1]) is a structural estimation technique introduced by Daniel McFadden. [2] It extends the generalized method of moments to cases where theoretical moment functions cannot be evaluated directly, such as when moment functions involve high-dimensional integrals.

  4. Center of pressure (fluid mechanics) - Wikipedia

    en.wikipedia.org/wiki/Center_of_pressure_(fluid...

    The total force vector acting at the center of pressure is the surface integral of the pressure vector field across the surface of the body. The resultant force and center of pressure location produce an equivalent force and moment on the body as the original pressure field. Pressure fields occur in both static and dynamic fluid mechanics ...

  5. Ground pressure - Wikipedia

    en.wikipedia.org/wiki/Ground_pressure

    Ground pressure is the pressure exerted on the ground by the tires or tracks of a motorized vehicle, and is one measure of its potential mobility, [1] especially over soft ground. It also applies to the feet of a walking person or machine. Pressure is measured in the SI unit of pascals (Pa).

  6. Force platform - Wikipedia

    en.wikipedia.org/wiki/Force_platform

    The simplest force plates measure only the vertical component of the force in the geometric center of the platform. More advanced models measure the three-dimensional components of the single equivalent force applied to the surface and its point of application, usually called the centre of pressure (CoP), as well as the vertical moment of force ...

  7. Rankine theory - Wikipedia

    en.wikipedia.org/wiki/Rankine_theory

    Rankine's theory (maximum-normal stress theory), developed in 1857 by William John Macquorn Rankine, [1] is a stress field solution that predicts active and passive earth pressure. It assumes that the soil is cohesionless, the wall is frictionless, the soil-wall interface is vertical, the failure surface on which the soil moves is planar , and ...

  8. Hausdorff moment problem - Wikipedia

    en.wikipedia.org/wiki/Hausdorff_moment_problem

    In the case m 0 = 1, this is equivalent to the existence of a random variable X supported on [0, 1], such that E[X n] = m n. The essential difference between this and other well-known moment problems is that this is on a bounded interval , whereas in the Stieltjes moment problem one considers a half-line [0, ∞) , and in the Hamburger moment ...

  9. Cauchy momentum equation - Wikipedia

    en.wikipedia.org/wiki/Cauchy_momentum_equation

    The effect of the pressure gradient on the flow is to accelerate the flow in the direction from high pressure to low pressure. As written in the Cauchy momentum equation, the stress terms p and τ are yet unknown, so this equation alone cannot be used to solve problems.

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