An Initially Installed Flywheel Can Store 10⁶ J of Kinetic

question 23

Multiple Choice

An initially installed flywheel can store 10⁶ J of kinetic energy when rotating at 300 rad/s.It is replaced by another flywheel of the same size but made of a lighter and stronger material.If its mass is half that of the original and it is now capable of achieving a rotational speed of 600 rad/s,what maximum energy can be stored?

• A)40 x 10⁵ J
• B)20 x 10⁵ J
• C)10 x 10⁵ J
• D)5.0 x 10⁵ J

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