Bx = Bhead - Btail = -5.5 - (-3.5) = - 2.0 m
|Bx| = 2 m
The magnitude of Bx is 2 m
Tactics Box: Determining the components of a vector
1. The absolute value |Ax| of the x component Ax is the magnitude of the component vector .
2. The sign of Ax 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, Bx and By, of vector B? Shown in the figure.
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