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a 20.00-kg box is attached to a light string that is wrapped around a cylindrical frictionless...

a 20.00-kg box is attached to a light string that is wrapped around a cylindrical frictionless spool of radius 15.0 cm and mass of 5.00 kg. The spool is suspended from the ceiling, and the box is then released from rest a distance 4.50 m above the floor.

What is the acceleration [in m/s2] of the box?

How long does it take [in s] for the box to reach the floor?

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