2.Motion in Straight Line
easy

चित्र किसी कण की एकविमीय गति का $x - t$ ग्राफ दर्शाता है । इसमें तीन समान अंतराल दिखाए गए हैं । किस अंतराल में औसत चाल अधिकतम है और किसमें न्यूनतम है ? प्रत्येक अंतराल के लिए औसत वेग का चिह बताइए।

Option A
Option B
Option C
Option D

Solution

Interval 3 (Greatest), Interval 2 (Least) Positive (Intervals $1$ and $2$), Negative (Interval 3 ) The average speed of a particle shown in the $x-t$ graph is obtained from the slope of the graph in a particular interval of time. It is clear from the graph that the slope is maximum and minimum restively in intervals 3 and 2 respectively. Therefore, the average speed of the particle is the greatest in interval 3 and is the least in interval $2 .$ The sign of average velocity is positive in both intervals 1 and 2 as the slope is positive in these intervals. However, it is negative in interval 3 because the slope is negative in this interval.

Standard 11
Physics

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