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Old Nov 8th 2018, 12:15 AM   #1
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Cylindrical roll of paper

Greetings to all

Any help to solve this problem ? i will be so thankful .

Best regards
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Old Nov 8th 2018, 02:19 AM   #2
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So all the energy for movement comes from the lowering of the high of the paper ...

we must assume there is zero loss

At time 0 the paper is stationary with it's center of mass a height R above the table ...

At any moment after that the height (and mass) of the roll has been reduced and this is the energy which goes ..

1 ... into the rotation of the remaining roll (you need moment of inertia and angular speed)

2. ... into the forward velocity of the remaining roll (1/2 m v squared)

Last edited by oz93666; Nov 8th 2018 at 02:21 AM.
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