# If the displacement of an object is proportional to square of time, then the object moves with:

s = ut + 1/2 at²

If object starts from rest i.e., its initial velocity (u) = 0 and has an acceleration (a) in time (t),

Then,

s = 0 + 1/2 at²

s = 1/2 at²

Now,

s ∝ t², if a = constant

So, the object moves with constant or uniform acceleration.

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(B) uniform acceleration