Vector and scalar Quantities Vector quantities need both magnitude(size)and direction to completely describe them Generally denoted by boldfaced type and an arrow over the letter t or- sign is sufficient for this chapter Scalar quantities are completely described by magnitude onlyVector and Scalar Quantities ◼ Vector quantities need both magnitude (size) and direction to completely describe them ◼ Generally denoted by boldfaced type and an arrow over the letter ◼ + or – sign is sufficient for this chapter ◼ Scalar quantities are completely described by magnitude only