A Horizontal Disk Rotates About a Vertical Axis Through Its

question 18

Multiple Choice

A horizontal disk rotates about a vertical axis through its center.Point P is midway between the center and the rim of the disk,and point Q is on the rim.If the disk turns with constant angular velocity,which of the following statements about it are true? (There may be more than one correct choice.)

• A) P and Q have the same linear acceleration.
• B) Q is moving twice as fast as P.
• C) The linear acceleration of Q is twice as great as the linear acceleration of P.
• D) The linear acceleration of P is twice as great as the linear acceleration of Q.
• E) The angular velocity of Q is twice as great as the angular velocity of P.

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Definitions:

Mini-Stroke

Also known as a Transient Ischemic Attack (TIA), it's a temporary blockage of blood flow to the brain, causing short-lived stroke-like symptoms.

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A condition where the valve between the heart's left upper chamber and left lower chamber doesn't close properly.

Heart Valve

Structures within the heart that open and close to control the flow of blood between the chambers of the heart and into the arteries.

Floppy

Pertaining to or characteristic of a floppy disk or flexible nature; often used to describe a state of lacking rigidity.