Kelvi

Two discs of the same moment of inertia rotating about their regular axis passing through the center and perpendicular to the plane of the disc with angular velocities ω1 \omega_1 and ω2. \omega_2. They are brought into contact face to face coinciding the axis of rotation. The expression for loss of energy during this process is

hard
System of Particles and Rotational Motion
2017
physics
1. 

14I(ω1−ω2)2\frac{1}{4} I (\omega_1 - \omega_2)^2

2. 

I(ω1−ω2)2I (\omega_1 - \omega_2)^2

3. 

18I(ω1−ω2)2\frac{1}{8} I (\omega_1 - \omega_2)^2

4. 

12I(ω1+ω2)2\frac{1}{2} I (\omega_1 + \omega_2)^2

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