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If a 1.5 m radius merry-go-round has a mass of 142.3 kg and a rotational kinetic energy of 10.75 J, how fast is it spinning?

rpm

If a 2.84 m radius merry-go-round has a mass of 163.3 kg and a rotational kinetic energy of 90.27 J, how fast is it spinning?

rpm

If a 2.17 m radius merry-go-round has a mass of 162.2 kg and a rotational kinetic energy of 27.13 J, how fast is it spinning?

rpm

If a 2.28 m radius merry-go-round has a mass of 161.1 kg and a rotational kinetic energy of 66.94 J, how fast is it spinning?

rpm

If a 1.58 m radius merry-go-round has a mass of 154.6 kg and a rotational kinetic energy of 1.28 J, how fast is it spinning?

rpm

If a 2.51 m radius merry-go-round has a mass of 178.8 kg and a rotational kinetic energy of 68.21 J, how fast is it spinning?

rpm