NEET Physics Speed & Velocity MCQ Question
Which of the following combinations correctly describe the relationship between speed, velocity, and acceleration in the context of motion in a straight line?
If speed is increasing, acceleration is in the same direction as velocity; if speed is decreasing, acceleration is in the opposite direction.
Average speed can be less than average velocity; this occurs when the object changes direction.
The sign of acceleration always indicates whether speed is increasing or decreasing.
Velocity is always equal to speed but can have a different sign based on the direction of motion.
Correct Answer
Detailed Explanation
Statement A accurately reflects the relationship between speed, velocity, and acceleration as described in the NCERT context. Statement B is misleading; average speed can be less than average velocity in cases of directional change. Statement C is incorrect; the sign of acceleration does not determine whether speed is increasing or decreasing. Statement D is incorrect, as velocity can differ from speed based on direction.
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