To remove a nail, a small block of wood is placed under a crowbar, and a horizontal

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To remove a nail, a small block of wood is placed under a crowbar, and a horizontal force P is applied as shown. Knowing that the maximum vertical force needed to extract the nail is 600 lb and that the horizontal force P is not to exceed 65 lb, determine the largest acceptable value of distance l.



To remove a nail, a small block of wood is

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