Basic Rotational Quantities: a Horizontal Disk Rotates About a Vertical

question 8

Multiple Choice

Basic rotational quantities: 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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