//Minimum force required
//refer fig. 5.13
//Applying Lami's theorem to system of forces on block
R1=20*sind(145)/sind(140)  //kN
R2=20*sind(75)/sind(140)  //kN
//Applying Lami's theorem to system of forces on wedge
P=R2*sind(130)/sind(105)  //kN
printf("required force is P=%0.2f kN",P)