On maple I want solve this, is the best way plot angles by time?I put M,m,r,theta,phy and plot first and than the second equation?

I have solution of this problem but how I can plot simulation on Maple?Thanks, In attach my problem

I need 4400 N of friction and not 2200N, so in wich direction operate it?Whit 2200N i I have mauch oscillation.fall_elevator_on_spring.msimfall_elevator_on_spring.msimthanks

It's ok isolate command? I need the solution sin(a)=+-1/(3^0.5)

attach photo, i need simple step after 2.78 like book, solution is sin(a)=+-1/(3)^0.5.