# Delta-*v* (physics)

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{{#invoke:Hatnote|hatnote}}

In general physics, **delta- v** is simply a change in velocity. The Greek uppercase letter delta is the standard mathematical symbol to represent change in some quantity.

Depending on the situation, delta-*v* can be either a spatial vector (Δ**v**) or scalar (Δ*v*). In either case it is equal to the acceleration (vector or scalar) integrated over time:

where:

**v**_{0}or*v*_{0}is initial velocity (at time*t*_{0}),**v**_{1}or*v*_{1}is subsequent velocity (at time*t*_{1}).