A rock is thrown vertically upwards with speed \( u\) from the edge of a cliff. At the same moment, a second rock is thrown vertically downwards with the same initial speed \( u\). Neglecting air resistance, which of the following statements is true?

W) The rock that was thrown upwards reaches the bottom of the cliff with a higher velocity

X) The rock that was thrown downwards reaches the bottom of the cliff with a higher velocity

Y) Both rocks reach the bottom of the cliff with the same velocity at the same time

Z) Both rocks reach the bottom of the cliff with the same velocity but at different times
Z) BOTH ROCKS REACH THE BOTTOM OF THE CLIFF WITH THE SAME