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Verified Answer :

marklukomskiy

I believe this is it
The centripetal force is given by
F = mv^2 / r
When v' = v/2,
F' = mv'^2/r = m(v/2)^2/r = mv^2/4r = F/4.
So the centripetal force is divided by 4.

ashirashfaq

it should be the 4... so the answer is 4...

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