A wire of length l and radius r is fixed at one end. When a steady force f is applied at the free end, the elongation in the wire is l. What is the relationship between the force applied and the elongation in the wire?
1) The force applied is directly proportional to the elongation in the wire
2) The force applied is inversely proportional to the elongation in the wire
3) The force applied is equal to the elongation in the wire
4) The force applied has no effect on the elongation in the wire