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If a 0.309 m radius hollow ball has a mass of 0.566 kg and a rotational kinetic energy of 0.2138 J, how fast is it spinning?

rpm

If a 0.38 m radius hollow ball has a mass of 0.71 kg and a rotational kinetic energy of 0.07771 J, how fast is it spinning?

rpm

If a 0.323 m radius hollow ball has a mass of 0.749 kg and a rotational kinetic energy of 0.06256 J, how fast is it spinning?

rpm

If a 0.404 m radius hollow ball has a mass of 0.511 kg and a rotational kinetic energy of 0.8989 J, how fast is it spinning?

rpm

If a 0.587 m radius hollow ball has a mass of 1.706 kg and a rotational kinetic energy of 0.3687 J, how fast is it spinning?

rpm

If a 0.324 m radius hollow ball has a mass of 0.415 kg and a rotational kinetic energy of 0.1851 J, how fast is it spinning?

rpm