An 80-N Uniform Plank Leans Against a Frictionless Wall as Shown

question 34

Multiple Choice

An 80-N uniform plank leans against a frictionless wall as shown. The torque (about point P) applied to the plank by the wall is:

• A) 40 N.m
• B) 60 N.m
• C) 120 N.m
• D) 160 N.m
• E) 240 N.m

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