(In contrast a scalar quantity has magnitude only - eg, the numbers 1, 2, 3, 4...) The diagram above represents a vector. The arrow displays its direction, hence this ...

When you're working in three dimensions, the only way to prove that three points are in a line (collinear) involves showing that a common direction exists. For this, you need to use vectors. Here's ...

Find quick revision notes of unit Vectors and 3D Geometry. This revision notes include important terms and formulae from these two chapters. At the time of examination this revision note will prove to ...