If a car moves with a uniform speed of 2 m/s in a circle of radius 0.4 m, its angular speed is
Correct answer: B. 5 rad/s
- A. 4 rad/s
- B. 5 rad/s
- C. 1.5 rad/s
- D. 2.8 rad/s
Explanation
Reason: The angular speed ( omega ) is related to linear speed ( v ) by the equation omega = v/r. Substituting the given values, omega = 2 m/s/0.4m}} = 5 rad/s.
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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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