A lift of weight W is lifted by a rope with an acceleration f. If the area of cross-section of the rope is A, the stress in the rope is

• A. <img src="/_files/images/civil-engineering/theory-of-structures/88-21-81-1.png">
• B. <img src="/_files/images/civil-engineering/theory-of-structures/88-21-81-2.png">
• C. <img src="/_files/images/civil-engineering/theory-of-structures/88-21-81-3.png">
• D. <img src="/_files/images/civil-engineering/theory-of-structures/88-21-81-4.png">