Observe that the given vector field is a gradient field:
Let
, so that



Integrating the first equation with respect to
, we get

Differentiating this with respect to
gives

Now differentiating
with respect to
gives

Putting everything together, we find a scalar potential function whose gradient is
,

It follows that the curl of
is 0 (i.e. the zero vector).
Answer:
-A.
Explanation:
: Hope it's Help:
[correct me if I'm not correct]
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Answer:c
Explanation: the speed of object a changes but b travels at constant speed