A Rotating Flywheel Can Be Used as a Method to Store

question 48

Multiple Choice

A rotating flywheel can be used as a method to store energy.If it has 1.0 ´ 10⁶ J of kinetic energy when rotating at 400 rad/s,and if a frictional torque of 4.0 N*m acts on the system,in what interval of time would the flywheel come to rest?

• A)3.5 min
• B)7.0 min
• C)14 min
• D)21 min

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