Y2 Vectors
What
You were originally introduced to Vectors at GCSE and this was developed in the first year of of A-Level in both Pure Maths and Mechanics.
To review your prior knowledge:
GCSE to A-Level Bridging Material
In the second year at A-Level, this will be extended so that you can work with Vectors in 3 dimensions. It is further developed in the mechanics topics where vectors are used in the context of real life problems.