# Vector Quantities

### Vector and Scalar Quantity

1. A scalar quantity is a quantity which can be fully described by magnitude only.
2. A vector quantity is a quantity which is fully described by both magnitude and direction.

#### Vector Diagram

1. The arrow shows the direction of the vector.
2. The length representing the magnitude of the vector.

#### Equal Vector

Two vectors A and B may be defined to be equal if they have the same magnitude and point in the same direction.