Since the bullets also have zero velocity, a more exact description of the bullet's state would be static equilibrium dynamic equilibrium elastic collision inelastic collision

Answer : The bullets have zero velocity, then bullets's state would be static equilibrium.

Explanation :  The bullets have zero velocity.

So, we can say the the bullet's state would be static equilibrium. because the bullet have zero velocity that means bullet is not accelerate .

Hence, no force will exert.

d. air pressure decreases as altitude increases.