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Statement of a problem № 3254

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A string is wrapped around a cylinder of mass m and radius R. The string is pulled vertically upwards to prevent the centre of mass from falling as the cylinder unwinds the string. Find (a) the tension in the string. (b) the work done on the cylinder when it acquires angular velocity w. (c) the length of the string unwound in the time the angular speed reaches w.

Solution:
A string is wrapped around a cylinder of mass m and radius R. The string is pull

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