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AP Physics 1
2.9 Circular Motion
IntermediateMCQConceptual25.6k
A side-view diagram shows a flat horizontal disk. A vertical dashed line passes through the center of the disk to indicate the axis of rotation. A small square block is positioned on the top surface of the disk at a horizontal distance r from the axis. A curved arrow around the axis indicates the disk is rotating with an angular speed omega.
A block on a rotating disk at distance r from the center.
A small block of mass \(m\) is placed on a horizontal disk at a distance \(r\) from the center. The disk rotates about its center with a constant angular speed \(\omega\). The block remains at rest relative to the disk. A second block of mass \(2m\) is made of the same material as the first block and is placed at the same distance \(r\) from the center. The disk again rotates at the same constant angular speed \(\omega\). Which of the following correctly identifies the force providing the centripetal acceleration and predicts whether the second block will slip?

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