A box slides down the three different (frictionless) tracks shown below. For each track, the box is released from rest at the same height above the ground, and then slides down the track toward the right. Rank the tracks (A, B, C) in terms of the box's speed at the end of the track, from fastest to slowest. Show your work in determining the ranking Note: In the diagram above, the 'balls' are meant to be 'box