An object is moving in a circle. It completes 6 revolutions in every 3 seconds. What is its frequency?
Correct answer: D. 2 Hz
- A. 0.5π Hz
- B. 2π Hz
- C. 0.5 Hz
- D. 2 Hz
Explanation
Frequency is number of revolutions per second, so frequency = revolution / time Frequency = 6/3 = 2 Hz
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About Angular Velocity
Angular velocity describes how quickly angular displacement changes with time, with ω = Δθ/Δt and units of radians per second. Questions relate angular and linear motion through v = rω, use the direction given by the right hand rule, and distinguish angular velocity from angular acceleration and ordinary frequency.
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