Two wires have the same material and have the same volume. However wire 1 had cross sectional area A and wire 2 has cross sectional area 3A. If the length of wire 1 increases by x on applying force F, how much force is needed to stretch wire 2 by the same amount?

Two wires have the same material and have the same volume. However wir

1.	Two wires have the same material and have the same volume. However wire 1 had cross sectional area A and wire 2 has cross sectional area 3A. If the length of wire 1 increases by x on applying force F, how much force is needed to stretch wire 2 by the same amount?
A.	F
B.	4F
C.	6F
D.	9F
Answer» E.