Question

under what condition can the acceleration
of a body be zero?​

Answer 1

Explanation:

According to newton's first law of motion, the acceleration of the body could be zero if there is no force acting on it. Acceleration in an object could be zero even when several forces acting on it. This happens when all the forces cancel out each other i.e the net force acting on the object is zero.

Answer 2

Theoretically impossible; however a particle in deep space may approximate this condition, so too particles bound by the nucleus in an atom.
:)