When a body is moving along a circular path it covers a certain angle in a given interval of time. Such type of motion is__________________?
Correct answer: D. Angular motion
- A. Vibratory motion
- B. Linear motion
- C. Rotatory motion
- D. Angular motion
Explanation
When motion is described by the angle swept out in a given time, the relevant quantity is angular motion, or angular displacement per time when the rate is being discussed. It differs from linear motion, which is described by distance along a straight path. Students may choose rotatory motion because the body travels around a circle, but rotatory motion usually refers to spinning about an axis rather than simply specifying the swept angle.
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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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