​Is it possible for the velocity and the acceleration of an object to have opposite signs? If not, state a proof.If so, give an example of such a situation and sketch a velocity–time graph to prove your point.

Yes, it is possible for the velocity and the acceleration of an object to have opposite signs. In this case, the object slows down.
-a=dvdt-a<0Or dvdt<0i.e. V final <V initial

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