A physics student standing on the edge of a cliff throws a stone vertically downward with an initial speed of \(10.0 \mathrm{~m} / \mathrm{s}\). The instant before the stone hits the ground below, it is traveling at a speed of \(30.0 \mathrm{~m} / \mathrm{s}\). If the physics student were to throw the rock horizontally outward from the cliff instead, with the same initial speed of \(10.0 \mathrm{~m} / \mathrm{s}\), what is the magnitude of the velocity of the stone just before it hits the ground?
A. \(10.0 \mathrm{~m} / \mathrm{s}\) B. \(20.0 \mathrm{~m} / \mathrm{s}\) C. \(\quad 30.0 \mathrm{~m} / \mathrm{s}\) D. \(\quad 40.0 \mathrm{~m} / \mathrm{s}\)
