When a body moves in a circle, the angle between its velocity v and angular velocity ω is always:
Correct answer: D. 90°
- A. 0°
- B. 180°
- C. 360°
- D. 90°
Explanation
The linear velocity is tangential while angular velocity is axial (perpendicular to the plane of motion). Therefore the angle between v (tangent) and ω (axis) is 90°.
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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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