A rock dropped straight down reaches a final velocity of 17.07 m/s, how far down did the rock fall? (Can someone plz help me out and if possible give the solution on how to solve it)

The coefficient of friction is a number that represents the resistance to sliding between two in contact with one another.

The atoms in a nickel crystal vibrate as harmonic oscillators with an angular frequency of 2.3 × 1013 rad/s. the mass of a nickel atom is 9.75 × 10-26 kg. what is the difference in energy between adjacent vibrational energy levels of nickel? (h = 6.626 × 10-34 j • s, , 1 ev = 1.60 × 10-19 j)

Place me with this question is my last question