A Phonograph Turntable, Initially Rotating at 0 $\pi$ Rad/s²"
C) $\pi$ /40 Rad/s²"
D)

Multiple Choice

A phonograph turntable, initially rotating at 0.75 rev/s, slows down and stops in 30 s.The magnitude of its average angular acceleration for this process is:

A) "1.5 rad/s²"
B) "1.5 $\pi$ rad/s²"
C) " $\pi$ /40 rad/s²"
D) " $\pi$ /20 rad/s²"
E) "0.75 rad/s²"