A body performing circular motion with a constant speed has a constant:
Correct answer: B. Angular velocity
- A. momentum
- B. Angular velocity
- C. Acceleration
- D. Radius vector
Explanation
When an object moves along a circle at constant speed, v, its angular velocity about the circle's center is also constant, and the object is said to move with uniform circular motion. Although the object's speed is constant, its direction of motion keeps changing, being always tangent to the circular path.
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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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