Which formula is used to find an object's acceleration?

The formula used to find an object's acceleration is a = Δv / Δt.
Acceleration is the rate of change of the velocity of an object with respect to time. It is a vector quantity.
The equation for acceleration is
a = Δv / Δt
where a is acceleration,
Δv is the change in velocity,
Δt is the amount of time it took for that change to occur.
The unit is [tex]\frac{m}{s^{2} }[/tex].
There are two ways by which an object can accelerate. One is to change the speed and other one is to change the direction. Even you can change both at same time.
If not changing any of them then object can not accelerate.
Some of examples of acceleration are
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