Chapter 28, Problem 19P

The following equation can be used to model the deflection of a sailboat mast subject to a wind force:

$\frac{d^{2}y}{d{z}^2}=\frac{f}{2EI}{\left(L-z\right)}^2$

where $f=$ wind force, $E=$ modulus of elasticity, $L=$ mast length, and $I=$ moment of inertia. Calculate the deflection if $y=0\text{ and }dy\text{/}dz=0\text{at }z=0$. Use parameter values of $=60,L=30,E=1.25\times {10}^8,\text{ and }I=0.05$ for your computation.