NEET Physics (general) MCQ Question
Which of the following statements about motion in a straight line are correct?
The direction of acceleration is always the same as that of velocity in uniform motion.
If a particle's speed is decreasing, the acceleration is in the direction opposite to that of the velocity.
The sign of acceleration indicates whether the speed of a particle is increasing or decreasing.
The choice of origin and axis does not affect the signs of displacement, velocity, and acceleration.
Correct Answer
Detailed Explanation
Statement B is correct as it reflects that when speed decreases, acceleration acts opposite to velocity. Statement A is incorrect because in uniform motion, acceleration is zero. Statement C is misleading as the sign of acceleration alone does not determine speed change. Statement D is incorrect because the choice of origin and axis does affect the signs of the quantities.
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