B_{x} = B_{head} - B_{tail} = -5.5 - (-3.5) = - 2.0 m

|B_{x}| = 2 m

The magnitude of B_{x} is 2 m

Tactics Box: Determining the components of a vector

1. The absolute value |A_{x}| of the x component A_{x} is the magnitude of the component vector .

2. The sign of A_{x} is positive if points in the positive x direction; it is negative if points in the negative x direction.

3. The y component is determined similarly.

Now combine the information given in the Tactics Box above to find the *x* and *y* components, *B*_{x} and *B _{y}*, of vector B? Shown in the figure.

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