IMathAS-libretexts

If you are playing pool on a cruise ship moving at constant velocity, do you have to account for the motion of the ship when you hit the ball?

Yes, because the ball is not moving relative to the ship
No, you and the ball are in the same frame of reference
Yes, because the ball is not in the ship's frame of reference
No, your relative velocity cancels out the ship's relative velocity

Which of the following occurences would affect the motion of the billiard ball while you are on the ship?

Another ship travels by coming towards your ship
The ship suddenly stops moving
Another ship travels by in the same direction as your ship
The ship continues moving at a constant velocity

Let's say you hit the ball so hard that it flies off the ship and into the water. Would the ball keep moving at the speed of the ship?

Yes, an object in motion cannot change its motion
Yes, an object cannot move to a new frame of reference
No, its relative velocity causes it to move backwareds
No, it is now in the water's frame of reference