The following problems are to be solved using the principle of virtual work.ProblemThe mas...

The following problems are to be solved using the principle of virtual work.

Problem

The mass m = 2 kg and the spring constant k = 100 N/m.

The spring is unstretched when x = 0.

(a) Determine the value of x for which the mass is in equilibrium.

---

(b) Is the equilibrium position stable or unstable? (See Example 11.3.)