Use the figure on the below to answer the next problem. A mass m = 0.5 kg is hung from a pulley with moment of inertia I = 0.20kg.m2 and radius R = 10cm. There is friction in the pulley. The mass is dropped from rest, and after 2s it traveled 4m.
-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
Correct Answer:
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