Answer:
The moment of inertia of disk B is 0.446 kilogram-square meters.
Explanation:
In this case, the moment of inertia of the disk B can be determined by means of the Principle of Conservation of Angular Momentum, whose model is:
(1)
Where:
, - Moments of inertia of disks A and B, in kilogram-square meters.
, - Initial angular velocities of disks A and B, in radians per second.
- Final angular velocity of the resulting system, in radians per second.
Let suppose that disk A rotates counterclockwise, whereas disk B rotates clockwise and that resulting system rotates counterclockwise. If we know that , , and , then the moment of inertia of the disk B is:
The moment of inertia of disk B is 0.446 kilogram-square meters.
It would be D because there is more gravitational forces acting on it than a small block of wood
If I'm correct if you pluck the center of the string creating a pulse off both directions and would be reflected off the ends of the string my calculations would be 10.37sec
i don't know the anss , sorry.