The shaft of a motor rotates at a constant angular speed of 360 rev/min. Angle turned through in 1 sec in radian is:
Correct answer: D. 12π
- A. π
- B. 6π
- C. 3π
- D. 12π
Explanation
360 rev/min = 6 rev/s. In one second the shaft turns 6 revolutions → angle = 6×2π = 12π radians.
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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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