Find how long does it take to reach floor

Reference no: EM13513970

A mass of 21.21 kg is attached to a light string t is wrapped around a cylindrical spool of radius 10 cm and moment of inertia 4 kgm2. Spool is suspended from ceiling and the mass is then released from rest at a distance 7.1 m above the floor. How long does it take to reach floor?

Reference no: EM13513970

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