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<<Mentor note: Thread split from https://www.physicsforums.com/threads/torque-opposite-in-direction-to-change-in-angular-momentum.866882/>> [Broken]

it can be proved that in this case pure rolling without slipping is impossible

ive assumed the cone to be right circular

proof by contradiction

https://drive.google.com/open?id=0B5m-h82V0Ej2b1g5YmFhSUk5UEE

https://drive.google.com/open?id=0B5m-h82V0Ej2aFRxR2RzRlFmaVk

https://drive.google.com/open?id=0B5m-h82V0Ej2aGxLRENyYmdXZVU

it can be proved that in this case pure rolling without slipping is impossible

ive assumed the cone to be right circular

proof by contradiction

https://drive.google.com/open?id=0B5m-h82V0Ej2b1g5YmFhSUk5UEE

https://drive.google.com/open?id=0B5m-h82V0Ej2aFRxR2RzRlFmaVk

https://drive.google.com/open?id=0B5m-h82V0Ej2aGxLRENyYmdXZVU

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