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makeAwish

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**Homework Statement**

Energy is to be stored in a flywheel in the shape of a uniform solid disk with a radius of = 1.30m and a mass of 66.0kg . To prevent structural failure of the flywheel, the maximum allowed radial acceleration of a point on its rim is 3600m/s² .

What is the maximum kinetic energy that can be stored in the flywheel?

**The attempt at a solution**

I took I = 3/2MR² (at rim)

where R = 2.6m

Then K = 1/2 * I * ω², where ω² = a/R

so K = (1/2)(3/2)(66kg)(2.6m)²(3600/2.6) = 463320J

which is wrong..

The ans is 7.72x10^4 J

can someone pls tell me where i gone wrong?

Thanks!