Position and Displacement

Position and Displacement

One general way of locating a particle (or particle like object) is with a position vector F, which is a vector that extends from a reference point (usually the origin of a coordinate system) to the particle. In the unit-vector notation of Section 3.4, r can be written

1

and rectangular coordinates ( 3 , 2 , 5 m).

As a particle moves, its position vector changes in such a way that the vector always extends to the particle from the reference point (the origin).

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where coordinates (x,y, z ) correspond to position vector rt and coordinates (x,y,z) correspond to position vector  .We can also rewrite the displacement by substituting.

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The position vector r for a particle is the vector sum of its vector components.
The position vector r for a particle
is the vector sum of its vector
components.

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