A multiple-drilling machine is used to drill simultaneously six holes in the ste

Question

A multiple-drilling machine is used to drill simultaneously six holes in the steel plate shown. Each drill exerts a clockwise couple of magnitude 40 lb in on the plate. Determine an equivalent couple formed by the smallest possible forces acting at A and C at A and D, on the plate. A 500 N force is applied to a bent plate as shown. Determine an equivalent force-couple system at B, an equivalent system formed by a vertical force at A and a force at B. Fig. P3.103 A 100-kN loads is applied eccentrically to the column shown. Determine the components of the force and couple at G that are equivalent to the 100-kN load

Explanation / Answer

a) Mc = 40 lb-in * 6 holes = 240 lb-in Mc = F*d 240 lb-in = F*12 in F = 20 lb ---> answer b) AD = SQRT(12^2 + 9^2) = 15 in Mc = F*d 240 = F*15 F = 16 lb ----> answer c) BC = SQRT(12^2 + 16^2) = 20 in Mc = F*d 240 = F*20 F = 12 lb ---> answer Please rate!

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