Question

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

Answer 1

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 $\left(F\right)$ 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 to move with zero acceleration.

$F_{external}=ma$

$\therefore$ $F_{external}=0$ $⟹a=0$

$\therefore$ $v_f=v_i$

Thus an object will kept on moving with a constant velocity $v$ if it was also moving initially.