Soni says that the acceleration in an object could be zero even when several forces are acting on it. Do you agree with her?

Yes, I agree with Soni that the acceleration in an object could be zero even when several forces are acting on it. Let equal and opposite forces (F) act on an object; they cancel out each other so that the net external force experienced by the object is zero, which makes the object move with zero acceleration. Fexternal = ma ∴ Fexternal = 0 ⇒ a = 0 ∴ vf = vi Thus, an object will keep on moving with a constant velocity vi if it was also moving initially.