Linear acceleration a = rα is zero when:
Correct answer: A. 0o
- A. 0o
- B. 180°
- C. 360°
- D. 90°
Explanation
Please note that the correct option is a) 0 degrees. When the angular acceleration (α) is 0 degrees, the object is not undergoing any rotation, and the linear acceleration (a) will be 0, regardless of the value of the radius (r).
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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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