A mass m = 0.5 kg is hung from a pulley with moment of inertia I = 0.20 kg  m² and radius R = 10 cm. There is friction in the pulley. The mass is dropped from rest, and after 2 s it traveled 4 m. What is the torque due to friction? A) 0.5 N  m B) 0.9 N  m C) 2.9 N  m D) 3.9 N  m E) 4.5 N  m

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The Answer of A mass m = 0.5 kg is hung from a pulley with moment of inertia I = 0.20 kg  m² and radius R = 10 cm. There is friction in the pulley. The mass is dropped from rest, and after 2 s it traveled 4 m. What is the torque due to friction? A) 0.5 N  m B) 0.9 N  m C) 2.9 N  m D) 3.9 N  m E) 4.5 N  m

A Mass M = 0