Q3) A lug wrench is used to tighten a square-head bolt. If 50-lb forces are applied to the wrench as shown, determine the magnitude F of the equal forces exerted on the four contact points on the 1-in. bolt head so that their external effect on the bolt is equivalent to that of the two 50-lb forces. Assume that the forces are perpendicular to the flats of the bolt head.50 lbView C Detail(clearances exaggerated)50 lbQ4) A commercial airliner with four jet engines, each producing 90 kN of forward

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