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Velocity-addition formula
also called Addition of velocities formula and has one more synonym

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  1. one of two physics equations that relates the velocities of a moving object in different reference frames

    Source: Wikipedia Unhappy with this fact? more info
    created by user picturefactobot on April 5, 2009
  2. If a ship is moving relative to the shore at velocity v, and a fly is moving with velocity u as measured on the ship, calculating the velocity of the fly as measured on the shore is what is meant by the addition of the velocities v and u

    Source: Wikipedia Unhappy with this fact? more info
    created by user picturefactobot on April 5, 2009
  3. In relativity, the frame of the ship has a different clock rate and distance measure, and the notion of simultaneity in the direction of motion is altered, so the addition law for velocities is changed and can also be called a composition law for vel

    Source: Wikipedia Unhappy with this fact? more info
    created by user picturefactobot on April 5, 2009
  4. Since a relativistic transformation rotates space and time into each other much as geometric rotations in the plane rotate the x and y axes, it is convenient to use the same units for space and time, otherwise there is a unit conversion factor which

    Source: Wikipedia Unhappy with this fact? more info
    created by user picturefactobot on April 5, 2009
  5. To translate the formula of the previous section to three-vector notation, replace u₁ with the component of U parallel to V

    Source: Wikipedia Unhappy with this fact? more info
    created by user picturefactobot on April 5, 2009
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