code class$=$"asciimath"$>$You are standing at the top of a cliff that has a stairstep configuration. There is a vertical drop of $7$ m at your feet, then a horizontal shelf of $7$ m $,$ then another drop of $3$ m to the bottom of the canyon, which has a horizontal floor. You kick a $0\mathrm{.}15$ kg rock, giving it an initial horizontal velocity that barely clears the shelf below. $7$ m $$x $10$ m v $7$ m $3$ m What initial horizontal velocity v will be required to barely clear the edge of the shelf below you? The acceleration of gravity is $9\mathrm{.}8($ m$)/($s$)2.$ Consider air friction to be negligible. Answer in units of$($ m$)/($s$)$