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categoryهندسة ميكانيكية schoolبكالوريوس event_available2026-07-13

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5. (20 points) A flatbed truck is driving and carrying a large box with mass M = 230 kg, height h = 1.30 m, and width w = 0.850 m. The box is connected to the bed of the truck with a cable that makes an angle of 0 = 50° with the horizontal and is attached to the box at a 3/4 h. The bed of the truck has friction. (a) The truck hits its brakes and decelerates at a constant rate of a = 8.10 m/s². What is the tension in the cable, the friction coefficient of the truck bed, and the normal force the bed exerts on the box? (b) If the max tension the cable can withstand is 600 N, and the truck is driving at a constant speed of 22.4 m/s, then how much breaking distance does the truck need in order for the cable to not break? F 0 W M

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