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//CHAPTER 3 ILLUSRTATION 11 PAGE NO 109
//TITLE:FRICTION
clc
clear
//===========================================================================================
//INPUT DATA
d1=15// DIAMETER OF VERTICAL SHAFT IN cm
N=100// SPEED OF THE MOTOR rpm
W=20000// LOAD AVILABLE IN N
U=.05// COEFFICIENT OF FRICTION
PI=3.147
//==================================================================================
T=2/3*U*W*d1/2// FRICTIONAL TORQUE IN N-m
PL=2*PI*N*T/100/60// POWER LOST IN FRICTION IN WATTS
//==================================================================================
//OUTPUT
printf('POWER LOST IN FRICTION=%3.3f watts',PL)
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