In the absence of an external torque the angular momentum of a rotating body is:
Correct answer: A. Constant
- A. Constant
- B. Variable
- C. Unstable
- D. Zero
Explanation
Angular momentum is a vector quantity representing the rotational motion of an object. According to the conservation of angular momentum, if there is no external torque acting on a rotating body, its angular momentum remains constant.
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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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