VEC002 · Vectors · Classes 11–12
Vector notation
Vectors are written in bold (v), with an arrow (AB→), as a column, or with unit vectors i (along x) and j (along y).
2i − 3jVector notation
📐 Formula
v = xi + yj = (x, y)
✏️ Worked example
(2, −3) = 2i − 3j: 2 right and 3 down.
🌍 Where it is used
Writing forces and velocities in physics.
❓ Quick check
(−1, 4) in i, j form is…
🏋️ Practice
EasyWrite 5i in component form.
Answer: (5, 0)
MediumWrite (3, 3) using i and j.
Answer: 3i + 3j
ChallengeWhat is i + j?
Answer: (1, 1)