Question
Explain subtraction of vectors.

Answer

  1. When two vectors are anti-parallel (in the opposite direction) to each other, the magnitude
  2. It is important to note that only vectors of the same type (physical quantity) can be subtracted.
  3. For example, if two vectors $\overrightarrow{ P }$ = 3 unit and $\overrightarrow{ Q }$ = 4 unit are acting in opposite direction,they are subtracted as,$|\overrightarrow{ R }|=\|\overrightarrow{ P }|-| \overrightarrow{ Q }\|$
    $=|3-4|=1$ unit, directed along $\overrightarrow{Q}$

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