A double-ended launching device sends two identical steel balls $X$ and $Y$ out at precisely the same time. The diagram indicates the balls’ initial velocities. Both are projected horizontally, although $Y$ has the larger speed. Which statement best explains what an observer would see?
- ABoth $X$ and $Y$ reach the ground simultaneously, because air resistance will cause both to have the same final speed.
- BBoth $X$ and $Y$ reach the ground simultaneously, because gravitational acceleration is the same for both.
- C$X$ reaches the ground before $Y$, because $X$ lands nearer to the launcher.
- D$Y$ reaches the ground before $X$, because $Y$ has greater initial speed.