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//CHAPTER 3 ILLUSRTATION 1 PAGE NO 102
//TITLE:FRICTION
//FIRURE 3.16(a),3.16(b)
clc
clear
//===========================================================================================
//INPUT DATA
P1=180// PULL APPLIED TO THE BODY IN NEWTONS
theta=30// ANGLE AT WHICH P IS ACTING IN DEGREES
P2=220// PUSH APPLIED TO THE BODY IN NEWTONS
//Rn= NORMAL REACTION
//F= FORCE OF FRICTION IN NEWTONS
//U= COEFFICIENT OF FRICTION
//W= WEIGHT OF THE BODY IN NEWTON
//==========================================================================================
//CALCULATION
F1=P1*cosd(theta)// RESOLVING FORCES HORIZONTALLY FROM 3.16(a)
F2=P2*cosd(theta)// RESOLVING FORCES HORIZONTALLY FROM 3.16(b)
// RESOLVING FORCES VERTICALLY Rn1=W-P1*sind(theta) from 3.16(a)
// RESOLVING FORCES VERTICALLY Rn2=W+P1*sind(theta) from 3.16(b)
// USING THE RELATION F1=U*Rn1 & F2=U*Rn2 AND SOLVING FOR W BY DIVIDING THESE TWO EQUATIONS
X=F1/F2// THIS IS THE VALUE OF Rn1/Rn2
Y1=P1*sind(theta)
Y2=P2*sind(theta)
W=(Y2*X+Y1)/(1-X)// BY SOLVING ABOVE 3 EQUATIONS
U=F1/(W-P1*sind(theta))// COEFFICIENT OF FRICTION
//=============================================================================================
//OUTPUT
printf('WEIGHT OF THE BODY =%.3fN\nTHE COEFFICIENT OF FRICTION =%.3f',W,U)
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