Consider a box sitting atop a friction-less inclined plane.
If the box is pushed off the edge of the inclined plane, it falls vertically to the ground under the influence of gravity only. If the box is released from rest in the other direction it slides down the frictionless inclined plane. The inclined plane has a height, $h$, and a length, $l$. Which of the following results in the box having the greatest velocity just before striking the ground?