KEY CONCEPT FIGURE 7.21 Signs and strengths of the torque. .. A positive torque tries to rotate the object counterclockwise about the pivot. Maximum positive torque for a force perpendicular to the radial line .. Pulling straight out from the pivot exerts zero torque. Pushing straight toward the pivot exerts zero torque. R... A negative torque tries to rotate the object clockwise about the pivot. Radial line Point where force is applied „ Maximum negative torque for a force perpendicular to the radial line Pivot point A 2F B 2F r/2 C D F F FE

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