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//block on horizontal plane
//refer fig. 15.6 (a) and (b)
//Inertia force of block m*a=3/9.81 kN
//applying equilibrium conditions
//N=1+P/2
//P*cosd(30)-F-3/9.81
//From law of friction
//F=mu*N
//Solving above equations
P=((3/9.81)+(0.25))/(cosd(30)-(0.125)) //kN
printf("\nP=%.3f kN",P)
//The answers vary due to round off error
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