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# Angular Velocity and Angular Acceleration Calculus

APPHMC-MBIEKZ

An object is found to rotate with an angular velocity $\omega (t)=15t^2-30t+25$ , where $\omega$ is measured in radians per second.

Which of the following best represents the time interval in which the angular acceleration of the object zero?

A

$0.5 s$

B

$1.0 s$

C

$1.5 s$

D

$2.0 s$

E

$2.5 s$