A solid cylinder is placed on the end of an inclined plane. It is found that the plane can be ti...

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A solid cylinder is placed on the end of an inclined plane. It is found that the plane can be tipped at an angle \( \theta \) before the
\( \mathrm{P} \) cylinder starts to slide. When the cylinder turns on its sides

W and is allowed to roll, it is found that the steepest angle at which the cylinder performs pure rolling is \( \phi \). The ratio \( \tan \phi / \tan \theta \) is
(1) 3
(2) \( 1 / 3 \)
(3) 1
(4) \( 1 / 2 \)
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