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Dot Product (Scalar)
Key Concepts — Dot Product (Scalar)
01
A·B = |A||B| cosθ — a scalar.
02
A·B = Aₓ Bₓ + Aᵧ Bᵧ + A_z B_z.
03
Perpendicular vectors: A·B = 0. Parallel: A·B = AB. Anti-parallel: A·B = −AB.
04
Work = F·d; Power = F·v — both are dot products.