The graph of x versus t (see fig.) is for a particle in straight line motion. State for each interval whether the velocity vx is +, –, or 0, and whether the acceleration ax is +, –, or 0. The intervals are OA, AB, BC and CD. From the curve is there any interval over which the acceleration is obviously not constant ? (Ignore the behaviour at the end points of the intervals.)
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Ans. Fig. vx + + 0 – ; Fig. vx + + + + ; In fig. , acc. is not const. over path AB & CD
ax 0 – 0 + ax – 0 + 0 ; In fig. , acc. is not const. over path OA & BC
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