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//Force required at the end of lever
d=40 //mm
p=20/3 //mm
W=40000 //N
R=400 //mm
mu=0.12
theta=atand(p/(%pi*d)) //degree
P=(d*W*(mu+tand(theta)))/(2*R*(1-mu*tand(theta))) //N
printf("Force required at the end of lever P=%0.2f N",P)
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