Question

A particle is moving with a uniform velocity .What is its acceleration?

Answer 1

If a particle is moving with a uniform velocity . Then it's acceleration is Zero .

HOPE THIS HELPS.

Answer 2

Acceleration is defined as the rate of change in velocity. If the velocity is uniform, this implies that it is not changing w.r.t. time. Therefore, if the change in velocity is zero the rate of change of velocity is also zero. Which by the definition makes the acceleration zero.
Time        : t₁        t₂
Velocity   : v₁       v₂
 As v₁=v₂=v  (uniform velocity)
 acceleration, a= $\frac{dv}{dt}$=$\frac{ v_{2} -v_{1}}{ t_{2}-t_{1} }$
                        =0