Rotational dynamics about a fixed axis: In the figure, a mass of 31.77 kg is attached to a light string that is wrapped around a cylindrical spool of radius 10.0 cm and moment of inertia 4.00 kg · m². The spool is suspended from the ceiling, and the mass is then released from rest a distance 5.70 m above the floor. How long does it take to reach the floor? A) 3.98 s B) 3.83 s C) 1.14 s D) 5.59 s E) 7.89 s

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The Answer of Rotational dynamics about a fixed axis: In the figure, a mass of 31.77 kg is attached to a light string that is wrapped around a cylindrical spool of radius 10.0 cm and moment of inertia 4.00 kg · m². The spool is suspended from the ceiling, and the mass is then released from rest a distance 5.70 m above the floor. How long does it take to reach the floor? A) 3.98 s B) 3.83 s C) 1.14 s D) 5.59 s E) 7.89 s

Rotational Dynamics About a Fixed Axis: in the Figure, a Mass