Problem 1-14/ Engineering Mechanics Materials.

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Engineering Mechanics Problem Solving.
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The blade of the hacksaw is subjected to a pretension force of F = 100 N. Determine the resultant internal loadings acting on section b – b that passes through point D .
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why did he use 15 cm to calculate the momentum distance and not sqrt((22.5)² cm + (15)² cm) wich is the actual distance from F to the cross section?

viniciusguedesaraujo