A CD with a Diameter of 12

question 44

Multiple Choice

A CD with a diameter of 12.0 cm starts from rest and with a constant angular acceleration of 1.0 rad/sec² acquires an angular velocity of 5.0 rad/sec.The CD continues rotating at 5.0 rad/sec for 15.0 seconds and then slows to a stop in 12.0 second with a constant angular deceleration.What is the centripetal acceleration of a point 4.0 cm from the center at the time 10.0 seconds from the start?

• A) 2.0 m/s²
• B) 1.8 m/s²
• C) 1.0 m/s²
• D) 0.9 m/s²
• E) 0.6 m/s²

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Definitions:

Variance

A statistical measure that represents the spread or dispersion of a set of data points from their mean.

Average Squared Difference

A statistical measure used in variance calculations, representing the average of the squared differences from the mean.

Actual Return

The real profit or loss achieved on an investment over a particular time period, often expressed as a percentage.

Risk-free Return

The theoretical return on an investment with zero risk of financial loss, typically associated with government bonds.