Two wires are made of the same material and have the same volume. Howe – McqOptions

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1.	Two wires are made of the same material and have the same volume. However wire 1 has cross- sectional area A and wire 2 has cross-sectional area 9A. If the length of wire 1 increases by Ax on applying force F, how much force is needed to stretch wire 2 by the same amount?
A.	16F
B.	25 F
C.	81 F
D.	64 F
Answer» D. 64 F

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