Use Nowton' s laws to solve problem

The frist question is Assumption :
1@:a=0,Ax=0,g=9.81m/s2
Fx=0,Fy=o
2@:Inclineo planes
Kinetic assumption :f(x)=uKF(n)
---positive X-a x is in direction of motion
-Positive a F
-Positive X -ax is in direction of potential motion
-uS =tan O,coefficient of friction
-Fs = u s Fn

-Total F ~Fx=0;Fy=0;

The second question is

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