What forces should be applied to the ends of a wire with a stiffness of 100 kN / m to stretch it by 1 mm?

First, I would like to say that you need to apply the Coulomb force to the wire, the formula of which is: F = k * x. F is the Coulomb force itself, k is the stiffness (specifically in our problem, the stiffness of the wire), x is the elongation of the wire. In general, if we substitute all the data from our problem, namely: x = 1 * 10 ^ (- 3) m k = 100 * 10 ^ (3), then we get the equation: F = 100 * 10 ^ (3) * 1 * 10 ^ (- 3). 10 ^ (3) and 10 ^ (- 3) will be destroyed and 1 * 100 will remain, from this we conclude that the force that stretches the wire is called the Coulomb force and is numerically equal to 100 Newtons, or simply N.