Energy

Energy has a magnitude and is measured in joules, but it does not point in a direction. It is therefore a scalar. Energy may be transferred from one place or store to another, but the direction of a transfer does not turn energy itself into a vector.

Energy may be held in different stores within that system. For example, a moving ball has a kinetic energy store, a raised object has a gravitational potential energy store, and a stretched spring has an elastic potential energy store.