initial commit / add all books

1 files changed, 32 insertions, 0 deletions

diff --git a/51/CH9/EX9.12/9_12.sce b/51/CH9/EX9.12/9_12.sce
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index 000000000..b2710c439
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+clc;

+clear;

+Dg=1.69;//in.

+Wg=0.0992;//lb

+Ug=200;//ft/sec

+Dt=1.5;//in.

+Wt=0.00551;//lb

+Ut=60;//ft/sec

+kvis=(1.57*(10^(-4)));//(ft^2)/sec

+Reg=Ug*Dg/kvis;

+Ret=Ut*Dt/kvis;

+//the corresponding drag coefficients are calculated as

+CDgs=0.25;//standard golf ball

+CDgsm=0.51;//smooth golf ball

+CDt=0.5;//table tennis ball

+Dgs=0.5*0.00238*(Ug^2)*%pi*((Dg/12)^2)*CDgs/4;//lb

+Dgsm=0.5*0.00238*(Ug^2)*%pi*((Dg/12)^2)*CDgsm/4;//lb

+Dt=0.5*0.00238*(Ut^2)*%pi*((Dt/12)^2)*CDt/4;//lb

+//the  corresponding decelerations are a=D/s=g*D/W

+//deceleration relative to g=D/W

+decgs=Dgs/Wg;

+decgsm=Dgsm/Wg;

+dect=Dt/Wt;

+disp("STANDARD GOLF BALL:")

+disp("lb",Dgs,"The drag coefficient=")

+disp(decgs,"The deceleration relative to g=")

+disp("SMOOTH GOLF BALL:")

+disp("lb",Dgsm,"The drag coefficient=")

+disp(decgsm,"The deceleration relative to g=")

+disp("TABLE TENNIS BALL:")

+disp("lb",Dt,"The drag coefficient=")

+disp(dect,"The deceleration relative to g=")
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