Answer
The component of the gravitational force on the box, perpendicular to the ramp decreases.
Work Step by Step
We can write an expression for the component of the gravitational force on the box, perpendicular to the ramp:
$F = mg~cos~\theta$
As $\theta$ increases from $\theta = 0^{\circ}$, the value of $cos~\theta$ decreases.
Therefore, the component of the gravitational force on the box, perpendicular to the ramp decreases.
