(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

What's the cliff's height (m) if a fallling boulder takes 1.3 s to fall the last 3rd of the way to the ground?

Air resistance is ignored, and the problem requires a quadratic formula.

2. Relevant equations

I think it's the constant x-acceleration formulas, which I can't type here because of the super subscripts/ subscripts.

3. The attempt at a solution

Actually, I don't even know how to begin this or set this up. =/ How do I solve this equation and determine which one of the given answers is correct? The answers in my textbook says it's either 246 m and 2.51 m, but how do I solve to get them?

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Finding height with constant acceleration

**Physics Forums | Science Articles, Homework Help, Discussion**