Solve the below problem:
Q: A collar B of mass m is attached to the spring AB and can move along the rod shown. The constant of the spring is 1.5kN/m and the spring is unscratched when a= 0. Knowing that the coefficient of static friction between the collar and the rod is 0.40, determine the range of values of m for which equilibrium can be maintained when θ= 30°.
