A Disk with Moment of Inertia I₁ = 40 Kg

question 100

Multiple Choice

A disk with moment of inertia I₁ = 40 kg  m² and angular velocity ₁ = 20 rad/s is dropped on to a stationary second disk along the axis of rotation. The second disk has moment of inertia I₂ = 60 kg  m². What is the angular velocity of the two disks?

• A) 4 rad/s
• B) 6 rad/s
• C) 8 rad/s
• D) 12 rad/s
• E) 20 rad/s

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