alleryStart learning →An object makes exactly one revolution every five seconds. What is its angular speed?
Api/5 rad/s
B2pi/5 rad/s
C5pi rad/s
D10pi rad/s
Answer & Solution
Correct answer: B. 2pi/5 rad/s
1. One revolution in five seconds is 1/5 revolution per second.
2. Each revolution equals 2pi rad, so the angular speed is (1/5)(2pi) rad/s.
3. That simplifies to 2pi/5 rad/s.
_Source: OpenStax Physics (CC BY 4.0), Ch 6 "Circular and Rotational Motion", section 6.1 Angle of Rotation and Angular Velocity_
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