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  2. Energy–momentum relation - Wikipedia

    en.wikipedia.org/wiki/Energymomentum_relation

    The energy and momentum of an object measured in two inertial frames in energymomentum space – the yellow frame measures E and p while the blue frame measures E ′ and p ′. The green arrow is the four-momentum P of an object with length proportional to its rest mass m 0.

  3. 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 ().

  4. Equations of motion - Wikipedia

    en.wikipedia.org/wiki/Equations_of_motion

    There are two main descriptions of motion: dynamics and kinematics.Dynamics is general, since the momenta, forces and energy of the particles are taken into account. In this instance, sometimes the term dynamics refers to the differential equations that the system satisfies (e.g., Newton's second law or Euler–Lagrange equations), and sometimes to the solutions to those equations.

  5. List of equations in classical mechanics - Wikipedia

    en.wikipedia.org/wiki/List_of_equations_in...

    Left: intrinsic "spin" angular momentum S is really orbital angular momentum of the object at every point, right: extrinsic orbital angular momentum L about an axis, top: the moment of inertia tensor I and angular velocity ω (L is not always parallel to ω) [6] bottom: momentum p and its radial position r from the axis.

  6. Relativistic mechanics - Wikipedia

    en.wikipedia.org/wiki/Relativistic_mechanics

    For this reason, many people prefer to use the rest mass and account for explicitly through the 4-velocity or coordinate time. A simple relation between energy, momentum, and velocity may be obtained from the definitions of energy and momentum by multiplying the energy by , multiplying the momentum by , and noting that the two expressions are ...

  7. Euler's laws of motion - Wikipedia

    en.wikipedia.org/wiki/Euler's_laws_of_motion

    Euler's first axiom or law (law of balance of linear momentum or balance of forces) states that in an inertial frame the time rate of change of linear momentum p of an arbitrary portion of a continuous body is equal to the total applied force F acting on that portion, and it is expressed as

  8. Classical central-force problem - Wikipedia

    en.wikipedia.org/wiki/Classical_central-force...

    In classical mechanics, the central-force problem is to determine the motion of a particle in a single central potential field.A central force is a force (possibly negative) that points from the particle directly towards a fixed point in space, the center, and whose magnitude only depends on the distance of the object to the center.

  9. Momentum - Wikipedia

    en.wikipedia.org/wiki/Momentum

    If the net force F applied to a particle is constant, and is applied for a time interval Δt, the momentum of the particle changes by an amount =. In differential form, this is Newton's second law ; the rate of change of the momentum of a particle is equal to the instantaneous force F acting on it, [ 1 ] F = d p d t . {\displaystyle F={\frac ...

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