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Q64 (NDA-I/2019) Science & Technology › Basic Science (Physics, Chemistry, Biology) › Basic mechanics concepts Answer Verified

In the given velocity (V) versus time (t) graph, accelerated and decelerated motions are respectively represented by line segments

Result
Your answer: —  Â·  Correct: C
Explanation

In a velocity-time (v-t) graph, the slope of the line represents the acceleration of the object. A positive slope, where the line moves upward from left to right, indicates acceleration (increasing velocity). Conversely, a negative slope, where the line moves downward from left to right, indicates deceleration or negative acceleration (decreasing velocity). In the standard kinematic graph associated with this problem, segment AB shows a downward slope, representing deceleration as velocity decreases over time [1]. Segment BC is a horizontal line, representing uniform motion with constant speed and zero acceleration [1]. Segment CD shows an upward slope, representing accelerated motion as velocity increases. Therefore, accelerated and decelerated motions are respectively represented by segments CD and AB.

Sources

  1. [1] Science-Class VII . NCERT(Revised ed 2025) > Chapter 8: Measurement of Time and Motion > 8.4 Uniform and Non-uniform Linear Motion > p. 117
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