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a roller whose diameter is 20 in weight 72 lbs. what horizontal force is necessary to pull the roller

  • physics -

    That will depend upon frictional torque on the roller axis. You have not provided enough information.

    Is your word "weight" supposed to be the verb "weighs"? Does "in" mean inches?

    I suspect you have omitted part of the question. Is the roller being pulled over a small bump, as in this question: ? Such problems can be solved by balancing torques about the line of contact.

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