Question: The graph in Figure describes the acceleration as a function of time for a stone rolling down a hill starting from rest. (a) Find the

The graph in Figure describes the acceleration as a function of time for a stone rolling down a hill starting from rest.
(a) Find the change in the stone's velocity between t = 2.5 s and t = 7.5 s.
(b) Sketch a graph of the stone's velocity as a function of time.

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