You are standing at the top of a cliff that has

Question

a stairstep configuration. There is a vertical
drop of 6 m at your feet, then a horizontal
shelf of 10 m , then another drop of 4 m to the
bottom of the canyon, which has a horizontal
floor. You kick a 0.49 kg rock, giving it an
initial horizontal velocity that barely clears
the shelf below.What initial horizontal velocity v will be
required to barely clear the edge of the shelf
below you? The acceleration of gravity is
9.8 m/s
2
. Consider air friction to be negligible.
Answer in units of m/s.