일반물리학 1 — Vectors: Problem 13

13 An object moves 1.00 m in a straight-line displacement \(\vec{a}\), changes direction, moves another 1.00 m in straight-line displacement \(\vec{b}\), and then ends up 1.00 m from the starting point. (a) Through what angle did it turn? (b) What is the magnitude of \(\vec{a} - \vec{b}\)?