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Created for Albert.io. All rights reserved 2016.

The graph above shows position versus time for a rover moving along a straight horizontal path. The rover might be subject to numerous forces during and in between the intervals that are shown.

During which of following time interval(s) is there zero net work being done on the rover?

I. 0 to 1 second
II. 1 to 2 seconds
III. 2 to 3 seconds

A

II only.

B

I and II only.

C

I and III only.

D

I, II, and III.

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