Vectors and Scalars
A vector has a magnitude (length) and a direction.
A scalar has no direction. Its value may be negative.
Example : Displacement is a vector .
When a particle changes its position from A to B, it undergoes a displacement from A to B, which we represent with an arrow pointing from A to B. The displacement tells us nothing about the actual path the particle takes.
Example: Temperature is a scalar
T = -100 C.
A vector can be shifted without changing its value, if its magnitude (length) and direction are not changed.
All are equivalent