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

A waterfall has a change in elevation of 4.4*10^2 m. When the water has fallen 12% of its way to the bottom, its speed is 93m/s. Neglecting air resistance and fluid friction, determine the speed of the water at the top of the waterfall.

2. Relevant equations

Et1=Et2

Ek1+Eg1=Ek2+Eg2

1/2m(v1)^2+mgh1=1/2m(v2)^2+mgh2

3. The attempt at a solution

g=9.81 N/kg

v1=?

v2=93m/s

h1=440m

h2=440m*0.88=387.2m

1/2m(v1)^2+mgh1=1/2m(v2)^2+mgh2

1/2(v1)^2+gh1=1/2(v2)^2+gh2

1/2(v1)^2+(9.81)(440m)=1/2(93)^2+(9.81)(387.2m)

Am I doing it right so far?

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# Homework Help: Easy-ish Conservation of Energy question!

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