Angle between radius vector and centripetal acceleration is
Correct answer: B. π
- A. 0°
- B. π
- C. 2π
- D. none of these
Explanation
When a particle moves in a circular path, the radius vector points from the center of the circle to the particle, while the centripetal acceleration points towards the center of the circle. Therefore, they are directed opposite each other, making the angle between them 180°. In radians, this angle is represented as π, making Option B the correct choice.Option A (0°) is incorrect because that would imply the vectors point in the same direction. Option C (2π) is incorrect because it suggests a full circle, which is not applicable here. Option D is incorrect because the correct answer is indeed included in the given options.
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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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