If \(F = k \frac { v^2 } { r } \), where \(k\) is a constant, what happens to the value of F when \(v\) is tripled and \(r\) is halved?
(A)F is doubled (B)F is tripled (C)F is multiplied by 8 (D)F is multiplied by 12 (E)F is multiplied by 18
E