Question
Assertion : A body having non-zero acceleration can have a constant velocity.
Reason : Acceleration is the rate of change of velocity.

Answer

(e) As per definition, acceleration is the rate of change of velocity, i.e. $\vec{a}=\frac{d \vec{v}}{d t}$.If velocity is constant $d \vec{v} / d t=0, \therefore \vec{a=0$.Therefore, if a body has constant velocity it cannot have non zero acceleration.

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