A decrease in velocity occurs at point D to E in the given displacement - time graph.
Velocity is defined as the time rate of change of displacement with time. It is measured in meters per second.
A decrease in velocity occurs when there is a small change in displacement at a large amount of time.
v = Δx/Δt
v = (60 - 40)/(60 - 40) = 1 m/s
v = (60 - 60)/(80 - 60) = 0 m/s
Thus, a decrease in velocity occurs at point D to E in the given displacement - time graph.
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