One radian means
Correct answer: B. Arc length of unit radius is unity
- A. Arc length of unit radius is half
- B. Arc length of unit radius is unity
- C. All of these
- D. One degree
Explanation
One radian is defined as the angle subtended from the center of a circle which intercepts an arc equal in length to the radius of the circle.
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About Angular Displacement
Angular displacement measures the change in a body’s angular position and is expressed in radians or degrees, with anticlockwise and clockwise directions assigned signs. It connects to arc length, angular velocity and angular acceleration, and must be distinguished from ordinary linear displacement in rotational motion.
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