A stone with mass $m$ is released from a tall building. Air resistance is significant. The acceleration of free fall is $g$. While the stone is moving with constant (terminal) velocity, which statement is correct?
- Aacceleration $= g$, force of gravity $= 0$, force of air resistance $= mg$
- Bacceleration $= 0$, force of gravity $= mg$, force of air resistance $= mg$
- Cacceleration $= 0$, force of gravity $= 0$, force of air resistance $= mg$
- Dacceleration $= 0$, force of gravity $= mg$, force of air resistance $= 0$