R+ P sin 50 = 15g
R= 15g -P sin 50
P cos 50 - friction
P cos 50= 0.2 ( 15g- P sin 50)
P cos 50= 29.4- P 0.2 sin 50
P cos 50 + P 0.2sin 50 = 29.4
P( cos 50 + 0.2 sin 50) = 29.4
P= 37 N
let coefficient of friction=c and alpha=x
Psinx+1.1gcosx=R
resolving horizontally (parallel to the plane)-->
Pcosx+F=1.1gsinx, F=cR, F=0.5R
Pcosx+0.5(Psinx+1.1gcosx)=1.1gsinx
Pcosx+0.5Psinx+0.55gcosx=1.1gsinx
P(cosx+0.5sinx)=1.1gsinx-0.55gcosx
P(cosx+0.5sinx)=11sinx-5.5cosx
P=2