hen a body moves in a circle, the angle between its linear velocity and angular velocity is always_______________?
Correct answer: C. 90°
- A. WA. 180°
- B. 0°
- C. 90°
- D. 45°
Explanation
For circular motion, linear velocity is tangent to the path, while angular velocity points along the rotation axis. The tangent and the axis are perpendicular, so the angle between them is 90°. The likely mistake is choosing 0° by treating both velocities as having the same direction of rotation.
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About Angular and Linear Quantities
Rotational motion relates angular displacement, angular velocity and angular acceleration to linear displacement, tangential velocity and tangential acceleration through the radius. Questions use radians, v equals r omega and tangential acceleration, while distinguishing tangential velocity from centripetal acceleration and angular quantities from their linear counterparts.
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