Sample Problem vector

Sample Problem vector

The position vector for a particle is initially,

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SOLUTION: The Key idea is that the displacement  is obtained subtracting the initial position vector from the later vector.That is most easily done by components.

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This displacement vector is parallel to the x plane.

CHECKPOINT:(a) If a wily but flies from xyz coordinate .What is displacement in unit vector notation?If so,which plane?

The displacement ~ r = r; - r, extends from the head of the initial position vector r, to the head of the later position vector r
The displacement 
extends from the head of the initial position vector  to the head
of the later position vector.
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