Statement 1 is false because the direction of velocity changes constantly, so velocity is not constant. Statement 2 is true because "uniformly" implies constant speed. Statement 3 is false because the direction of centripetal acceleration is constantly changing. Statement 4 is true because the magnitude of centripetal acceleration (v²/r) is constant when speed (v) and radius (r) are constant.
A brass ball is tied to a thin wire and swung so as to move uniformly in a horizontal circle. Which of the following statements in this regard is / are true? 1. The ball moves with constant velocity 2. The ball moves with constant speed 3. The ball moves with constant acceleration 4. The magnitude of the acceleration of the ball is constant Select the correct answer using the code given below:
Asked in UPSC NDA 2 2015 · Topic: Mechanics (Newton's Laws of Motion and their applications)
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