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  2. Center of mass - Wikipedia

    en.wikipedia.org/wiki/Center_of_mass

    The experimental determination of a body's center of mass makes use of gravity forces on the body and is based on the fact that the center of mass is the same as the center of gravity in the parallel gravity field near the earth's surface. The center of mass of a body with an axis of symmetry and constant density must lie on this axis.

  3. Three-body problem - Wikipedia

    en.wikipedia.org/wiki/Three-body_problem

    The center of mass, in accordance with the law of conservation of momentum, remains in place. In physics , specifically classical mechanics , the three-body problem is to take the initial positions and velocities (or momenta ) of three point masses that orbit each other in space and calculate their subsequent trajectories using Newton's laws of ...

  4. Barycenter (astronomy) - Wikipedia

    en.wikipedia.org/wiki/Barycenter_(astronomy)

    m 1 is the mass of the primary in Earth masses (M E) m 2 is the mass of the secondary in Earth masses (M E) a (km) is the average orbital distance between the centers of the two bodies; r 1 (km) is the distance from the center of the primary to the barycenter; R 1 (km) is the radius of the primary

  5. Two-body problem - Wikipedia

    en.wikipedia.org/wiki/Two-body_problem

    The mutual center of mass may even be inside the larger object. For the derivation of the solutions to the problem, see Classical central-force problem or Kepler problem. In principle, the same solutions apply to macroscopic problems involving objects interacting not only through gravity, but through any other attractive scalar force field ...

  6. List of centroids - Wikipedia

    en.wikipedia.org/wiki/List_of_centroids

    The following is a list of centroids of various two-dimensional and three-dimensional objects. The centroid of an object in -dimensional space is the intersection of all hyperplanes that divide into two parts of equal moment about the hyperplane.

  7. Mass point geometry - Wikipedia

    en.wikipedia.org/wiki/Mass_point_geometry

    Mass Point - A mass point is a pair (,), also written as , including a mass, , and an ordinary point, on a plane. Coincidence - We say that two points m P {\displaystyle mP} and n Q {\displaystyle nQ} coincide if and only if m = n {\displaystyle m=n} and P = Q {\displaystyle P=Q} .

  8. Two-body problem in general relativity - Wikipedia

    en.wikipedia.org/wiki/Two-body_problem_in...

    In the Schwarzschild solution, it is assumed that the larger mass M is stationary and it alone determines the gravitational field (i.e., the geometry of space-time) and, hence, the lesser mass m follows a geodesic path through that fixed space-time. This is a reasonable approximation for photons and the orbit of Mercury, which is roughly 6 ...

  9. Newton's laws of motion - Wikipedia

    en.wikipedia.org/wiki/Newton's_laws_of_motion

    The total center of mass of the forks, cork, and toothpick is on top of the pen's tip. Significant aspects of the motion of an extended body can be understood by imagining the mass of that body concentrated to a single point, known as the center of mass. The location of a body's center of mass depends upon how that body's material is distributed.