Physics

To determine which time intervals does the object decrease velocity, we need to look at the change of the magnitude of the velocity values on the graph.

Analysis of each time interval:

0 - 10 mins:

The velocity is increasing from 0 to 60 m/min. The object is speeding up in this interval.

15 - 30 mins:

The initial velocity is 60 m/min and the final velocity is 0. The velocity is decreasing, so the object is slowing down.

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