When a cannon ball is shot from a cannon _______________.

the cannon's velocity is equal to that of the cannon ball


the cannon and the cannon ball move in the same direction


the momentum of the cannon is equal to that of the cannon ball


the cannon's velocity is unchanged

the cannon's velocity is equal to that of the cannon ball FALSE

the cannon and the cannon ball move in the same direction FALSE

the momentum of the cannon is equal to that of the cannon ball TRUE, although their directions are opposite, so strictly speaking their momenta are NOT equal, just the magnitude of their momenta.

the cannon's velocity is unchanged FALSE

This question is actually slightly ambiguous. The obvious answer is C. However, the answer could also be A. The question seems to assume that the cannon ball and the cannon have different masses. If they have the same mass, then they will move at the same speed.

Technically none of these answers are right because velocity and momentum are vector quantities. If the cannon and the cannon ball are traveling in opposite directions, they cannot have the same momentum or velocity because they would have opposite signs.

But to cut through the BS. The answer is C. TECHNICALLY

Momentum of 2 objects reamins same, due to Law of Conservation of Momentum
Initial momentum=Final momentum (if no external forces act on the system)
Others are naturally false.