Learning Goal Part A To be able to calculate the moment of a force about a speci

Question

Learning Goal Part A To be able to calculate the moment of a force about a specified axis Unscrewing a bolt requires a moment of 31.0lb.ft. The z axis passes through the center of the bolt. Aforce F-21.3i 6.00j+4.00k lb is applied to the end of the wrench. (Figure 1) What minimum length, d, must the wrench have to turn the bolt'? When the moment of a force is computed about a point, the moment and its axis are always perpendicular to the plane that contains the force and the moment arm. In some instances it is important to find the component of this moment along a specified axis that passes through the point. In addition to scalar analysis, Ma, the magnitude of the moment of a force about a specified axis, can be found using the triple scalar product Express your answer numerically in inches to three significant figures. View Available Hint(s) in where U is the unit vector that describes the direction of the specified axis and r is the position vector lo the point where the force F is applied Submit Part B This question will be shown after you complete previous question(s). 1 of1 > Part C This question will be shown after you complete previous question(s).

Explanation / Answer

To unscrew the bolt only force in x direction works

So by torque = rFx

31 = 21.3×dmin

dmin = 31/21.3 = 1.455 ft

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