Independent motions in a plane

A puck starts at the origin with velocity $(4, 3)\ \text{m/s}$, and a fan gives it a steady acceleration $(0, -2)\ \text{m/s}^2$. You will make the program work out its path, part by part, and find where it crosses the $x$ axis again.

The idea. The $x$ motion and the $y$ motion are separate, and share only the time:

Your tasks.

1. Find x and y at every time in the list t.
2. Find the time when the puck is back at $y = 0$, from the formula $t = -\dfrac{2u_y}{a_y}$.
3. Find how far along $x$ it is at that time.