5. One end of a uniform wire of length L and of weight W is attached rigidly to a point in the roof and a weight is suspended from its lower end. If S is the area of cross-section of the wire, the stress in the wire at a height 3L/4 from its lower end is
(a) W1/S (b) W1 +(W/4) / S
(c) W1+(3W/4) / S (d) (W1+W)/S
Answer-c
(10)
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(a) – 5 J (b) – 10 J (c) – 15 J (d) – 20 J Answer-a (123)