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
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(a) – 5 J (b) – 10 J (c) – 15 J (d) – 20 J Answer-a