The board is used to hold the end of a fourway lug wrench in

The board is used to hold the end of a four-way lug wrench in position. If a torque of 34 N?m about the x axis is required to tighten the nut, determine the required magnitude of the force F that the man\'s foot must apply on the end of the wrench in order to turn it. Force F lies in a vertical plane

Solution

Required Torque = product of man\'s force applied and perpendicular distance from axis of rotation to applied force

   38 = F * 0.250 ( Force F lies in vertical plane)

   F = 38/0.250

   F = 152 N