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:
1 only
1 and 3
1, 2 and 4
2 and 4 only
Answer is Right!
Answer is Wrong!
This question was previously asked in
UPSC NDA-2 – 2015
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.