A mass m1 = 1 kg rests on top of a mass m2 = 5 kg which is attached to a spring (k = 50 N/m) as shown in the figure. The coefficient of static friction between the masses m1 and m2 is 0.5.
a) Determine the maximum value of acceleration that the masses can have without the top mass slipping.
b) Determine the maximum amplitude of the motion such that the top mass does not slip