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

A rock from high of ##h=180m## goes down and the gravity is ##g=9.81\frac{m}{s^2}##.

Find for how much time did the rock fall down and the velocity of the rock.

2. Relevant equations

##v^2=2gh##

##v=\sqrt{2gh}##

##t=\frac{v}{g}##

3. The attempt at a solution

First of all we will find the velocity because, to find time we need the velocity so:

##v=\sqrt{2gh}=\sqrt{2χ9.81\frac{m}{s^2}χ180m}=

\sqrt{3531.6}=59.43 \frac{m}{s}##

##t=\frac{v}{g}=\frac{59.43\frac{m}{s}}{9.81\frac{m}{s^2}}=6.1s##

is that correct way to do it?

BTW. how to make the square root on formulas?

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# Homework Help: Gravity, velocity time and distance problem

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