Question: A solid sphere of radius R is placed at a height of 30 cm on a 15 slope. It is released and rolls, without slipping,

A solid sphere of radius R is placed at a height of 30 cm on a 15° slope. It is released and rolls, without slipping, to the bottom. From what height should a circular hoop of radius R be released on the same slope in order to equal the sphere’s speed at the bottom?

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