A 018 M Radius Pulley Is Free to Rotate About a a Horizontal

question 36

Multiple Choice

A 0.18 m radius pulley is free to rotate about a horizontal axis.A 4.2 kg mass and a 8.0 kg mass are attached by a massless string,which is hung over the pulley.If the string does not slip,calculate the magnitude of the net torque on the pulley about its rotational axis.

• A)6.7 N ∙ m
• B)5.5 N ∙ m
• C)7.6 N ∙ m
• D)9.5 N ∙ m

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