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37. A person supports a book between his finger and thumb as shown (the point of grip is assumed to be at the corner of the book). If the book has a weight of W then the person is producing a torque on the book of

(a)    w. a/2    anticlockwise

(b)     w. b/2  anticlockwise

(c)      wa anticlockwise

(d)     wa  clockwise

Ans. b

(72)

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