Calculate the magnitude of the normal force and the acceleration of the box in this experiment: Take a 10 kg box on a frictionless 30o inclined plane and release your hold, allowing the box to slide to the ground, a horizontal distance of d meters and a vertical distance of h meters as shown in the diagram below:

Question

$\begin{array}{1 1}45N,9.8m/s^2\\85N,9.8m/s^2\\45N,4.9m/s^2\\85N,4.9m/s^2\end{array} $