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## Homework Statement

A water wheel rotates a generator producing power from vertically flowing water onto its blades. Height of water is 100m above blades. init vert velocity is 0.

I have calc velocity at hitting wheel as 44.3m/s

calc the mass of water hitting the wheel per second to create 20kW power

Calc rev/min of gene (wheel and gene combined radius of gyration 3m and mass 120kg)

## Homework Equations

v²=u²+2as

K.E=0.5mv²

P.E=mgh

J=mk²

g=9.8m/s²

## The Attempt at a Solution

For mass I have calculated P.E and K.E in terms of m and made equal to 2000 giving answer 10.2Kg? not sure if this is right.

For rev/min I have worked out J=120x3² = 1080kg m², not sure where to go from here?