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Q. The velocity versus time curve of a moving point is as shown in the figure. The maximum acceleration isPhysics Question Image

Motion in a Straight Line

Solution:

Maximum acceleration is represented by maximum slope of velocity-time graph. It is for portion $C D$ of graph.
Slope of $C D=\frac{60-20}{40-30}=\frac{40}{10}=4 \,m / s ^{2}$