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Q. The displacement versus time graph for a body moving in a straight line is shown in figure. Which of the following regions represents motor when no force is acting on the body?Physics Question Image

Bihar CECEBihar CECE 2013Motion in a Straight Line

Solution:

Slope of displacement versus time graph gives the velocity. This is constant here only during the $b c$, as the graph is a straight line in it. Constant velocity means no acceleration,