# What is the SI units for acceleration?

**Second**Law. The SI unit for acceleration is

**metre per second**squared (

**m**⋅s−2).

Similarly, it is asked, what is acceleration and its SI unit?

**SI unit** of **acceleration** = **Unit** of velocity/**Unit** of time = m/s^2 = ms^-2. In physics or physical science, **acceleration** (symbol: a) is defined as the rate of change (or derivative with respect to time) of velocity. It is thus a vector quantity with dimension length/time².

**Speed**and

**velocity**are both measured using the same

**units**. The

**SI unit**of distance and displacement is the meter. The

**SI unit**of time is the second. The

**SI unit of speed**and

**velocity**is the ratio of two — the meter per second .

Hereof, what is the unit for acceleration?

The SI **unit** of **acceleration** is the metre per second squared (m s^{−}^{2}); or "metre per second per second", as the velocity in metres per second changes by the **acceleration** value, every second.

**Velocity** (v) is a vector quantity that measures displacement (or change in position, Δs) over the change in time (Δt), represented by the **equation** v = Δs/Δt. Speed (or rate, r) is a scalar quantity that measures the distance traveled (d) over the change in time (Δt), represented by the **equation** r = d/Δt.