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elasticities
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Homework Statement
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.
Homework Equations
Et1=Et2
Ek1+Eg1=Ek2+Eg2
1/2m(v1)^2+mgh1=1/2m(v2)^2+mgh2
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?