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## Homework Statement

Estimate the total rotational moment of inertia in Kg*m^2, of all the motors and generators in the Eastern United States.

## Homework Equations

No other information was provided.

## The Attempt at a Solution

First off I went to the following web site to estimate the generation capacity of the Eastern U.S.

http://www.eia.doe.gov/cneaf/electricity/epm/table1_6_a.html

I came up with a total of 2.1673e8 MWh for the Eastern U.S.

=2.1673e11 KWh

I know that 1 KW=3600 Joules.

so from this I get a total of 7.80228e14 Joules

From here I am at a loss at how to convert this to rotational moment of Inertia( Kg*m^2)