//Example 5.5
S=80*10^9;//Shear modulus (N/m^2), See Table 5.3
r=0.750*10^-3;//Radius of nail (m)
A=%pi*r^2;//Cross-sectional area of nail (m^2)
delta_x=1.8*10^-6;//Amount of flex (m)
L_0=5*10^-3;//Original length (m)
F=S*A*delta_x/L_0;//Weigth of the picture (N)
m=F/g;//Picture's mass (kg)
printf('Mass of the picture = %0.1f kg',m)
//Openstax - College Physics
//Download for free at http://cnx.org/content/col11406/latest