A Wheel Is Rotating Freely with an Angular Speed of 20

question 47

Multiple Choice

A wheel is rotating freely with an angular speed of 20 rad/s on a shaft whose moment of inertia is negligible.A second identical wheel,initially at rest,is suddenly coupled to the same shaft.The angular speed of the coupled wheels is

• A)10 rad/s
• B)14 rad/s
• C)20 rad/s
• D)28 rad/s
• E)40 rad/s

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