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A person opens a door by applying a 10-N force perpendicular to it at a distance 0.90m from the hinges.



Answer :

AL2006
You faded out there before asking your question. 
Here's some info that might be of interest:

Torque = (force) x (distance from the pivot) = (10 n) x (0.9 m) = 9 newton-meters

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