4. A string is wrapped around a cylinder of mass mand
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
an angular velocity
(c) The length of the string unwound in the time the
angular speed reaches W​
Answers: 3
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4. A string is wrapped around a cylinder of mass mand
radius R. The string is pulled vertically up...
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