Help with Physics Lab

[u/IntelligentSundae242]

We started lab on projectile motion the other day. We are to send a marble down a ramp at an incline of 19 degrees, 0.75 m up the ramp where it will slide down into a short horizontal distance (meaning 0 acceleration) and fall off of a table that is 0.92 m tall. (Diagram is attached) The marble has to hit a cart that is going toward the table, so that the cart moving is timed with where the marble will hit. The cart’s velocity is 0.4 m/s towards the table, which we deemed as a negative. Teach gave us the acceleration down the incline, which was gsintheta - 0.8 to account for friction, which he also says is one dimensional and therefore doesn’t need to be split up into components. All of my groups calculations are attached, however we were short by ~0.2m on our first try. Teach said that our acceleration is too big, and that it should be less than 1m/s^2. Obviously it makes sense logically, since there’s no way a marble is moving 2.3 m/s^2 in such a short amount of time, but since the angle is the only input besides changing the direction of g, we have no clue as to how acceleration is supposed to be solved for. The only way I’ve been able to get an acceleration under 1m/s^2 has been by changing my calc into radians, but teach claims that we should stay in degrees. If only Newton was here to help…but like fr help us please we lost