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Chapter summary

Presentation: VPgig

  • A scalar is a physical quantity with magnitude only.

  • A vector is a physical quantity with magnitude and direction.

  • Vectors may be represented as arrows where the length of the arrow indicates the magnitude and the arrowhead indicates the direction of the vector.

  • The direction of a vector can be indicated by referring to another vector or a fixed point (e.g. \(\text{30}\)\(\text{°}\) from the river bank); using a compass (e.g. N \(\text{30}\)\(\text{°}\) W); or bearing (e.g. \(\text{053}\)\(\text{°}\)).

  • The resultant vector is the single vector whose effect is the same as the individual vectors acting together.