A Turntable Is Initially at Rest

question 67

Multiple Choice

A turntable is initially at rest.It starts rotating with a constant maximum angular acceleration for a period of 5 seconds.It then starts to slow down with an angular acceleration of -1 rad/s² for another 5 seconds.At the end of the 10 second period the turntable has undergone 20 rotations.What is the maximum angular acceleration the turntable reaches?

• A)-1 rad/s²
• B)2 rad/s²
• C)1 rad/s²
• D)-3.68 rad/s²
• E)3.68 rad/s²

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