The angular speed of the hour hand of a mechanical watch is ----- radians per hour
Correct answer: A. π/6
- A. π/6
- B. π/4
- C. π/12
- D. π/8
Explanation
The hour hand of a clock completes one full revolution (2π radians) in 12 hours. So, the angular speed of the hour hand is 2πradians/12hours=π/6radians/hour.
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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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