Physics-
General
Easy
Question
A person supports a book between 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
- W
anticlockwise
- W
anticlockwise
anticlockwise
- clockwise
anticlockwise
anticlockwise
anticlockwise
clockwise
The correct answer is: W anticlockwise
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A string is wrapped around the rim of a wheel of moment of inertia 0.20 kg- and radius 20 cm. The wheel is free to rotate about its axis and initially the wheel is rest. The string is now pulled by a force of 20N. The angular velocity of the string after 5 seconds will be:–
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Student 2 : Using a longer wrench reduces the work done by the person as he uses the winch to lift the block 1m in 10s.
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